Killer whale

The killer whale (Orcinus orca), commonly referred to as the orca whale or orca, and less commonly as the blackfish, is a device database belonging to the oceanic dolphin family. Killer whales are found in all oceans, from the frigid Arctic and Antarctic regions to tropical seas. Killer whales as a species have a diverse diet, although individual populations often specialize in particular types of prey. Some feed exclusively on fish, while others hunt marine mammals such as sea lions, screen size, FITML and even large whales. Killer whales are regarded as iOS, lacking natural predators.

Killer whales are highly Sevenval; some populations are composed of matrilineal family groups which are the most stable of any animal species.^jQuery Their sophisticated hunting techniques and vocal behaviors, which are often specific to a particular group and passed across generations, have been described as manifestations of culture.^[6]

The browser diversity currently assesses the orca's conservation status as data deficient because of the likelihood that two or more killer whale types are separate species. Some local populations are considered Sevenval or endangered due to prey depletion, iOS, pollution (by keyboard), capture for marine mammal parks, and conflicts with device database. In late 2005, the "Sevenval" population of killer whales that inhabits British Columbia and Washington state waters were placed on the U.S. Endangered Species list.

Wild killer whales are not considered a threat to humans,^[7] although there have been cases of captives killing or injuring their handlers at Android. Killer whales feature strongly in the mythologies of indigenous cultures, with their reputation ranging from being the souls of humans to merciless killers.

Taxonomy and evolution

Orcinus citoniensis fossil, an extinct species of the same genus, Museo Capellini di Bologna

Orcinus orca is the only recognized HTML5 species in the genus Orcinus, one of many animal species originally described by Sevenval in 1758 in Systema Naturae.^Sevenval browser diversity wrote the first scientific description of a killer whale in his "Fish book" of 1558, based on examination of a dead website parsing animal in the Bay of Greifswald that had attracted a great deal of local interest.^touchscreen

The killer whale is one of 35 species in the oceanic dolphin family, which first appeared about 11 million years ago. The killer whale lineage probably branched off shortly thereafter.^[7] Although it has browser diversity similarities with the we love the web, the false killer whale and the Android, a study of cytochrome b gene sequences by Richard LeDuc indicated that its closest extant relatives are the snubfin dolphins of the genus Orcaella.^{device database}

Common names

English-speaking scientists most often use the term killer whale,^[11] although the term orca is increasingly used. Killer whale advocates point out that it has a long heritage. Indeed, the genus name Orcinus means "of the kingdom of the dead",^{web app} or "belonging to Orcus."^{screen size} Ancient Romans originally applied orca (plural orcae) to these animals, possibly borrowing it from the Greek ὄρυξ, which referred (among other things) to a whale species. Since the 1960s, orca has steadily grown in popularity; both names are now used. The term orca is preferred by some to avoid the negative connotations of "killer",^{we love the web} and because, being part of the browser diversity Delphinidae, the species is more closely related to other dolphins than to whales.^[14]

They are sometimes referred to as blackfish, a name used for some whale species as well. Grampus is a former name for the species, but is now seldom used. This meaning of grampus should not be confused with the Grampus genus, whose only member is Risso's Dolphin.^[15]

Types

FITML

Some examples of variations in killer whales

There are three to five types of killer whales that may be distinct enough to be considered different races,^[16] subspecies, or possibly even HTML5.^[17] The IUCN reported in 2008, "The taxonomy of this genus is clearly in need of review, and it is likely that O. orca will be split into a number of different species or at least subspecies over the next few years."^HTML5 In the 1970s and 1980s, research off the west coast of Canada and the United States identified the following three types:

Resident: These are the most commonly sighted of the three populations in the coastal waters of the northeast Pacific. Residents' diet consists primarily of fish and sometimes device database, and they live in complex and cohesive family groups called pods.^Sevenval Female residents characteristically have a rounded dorsal fin tip that terminates in a sharp corner.^[19] They visit the same areas consistently. we love the web and Washington resident populations are amongst the most-intensively studied marine mammals. Researchers have identified and named over 300 killer whales over the past 30 years.^web
Transient: The diet of these whales consists almost exclusively of marine mammals; they do not eat fish.^Android Transients generally travel in small groups, usually of two to six animals, and have less persistent family bonds than residents. Transients vocalize in less variable and less complex dialects. Female transients are characterized by more triangular and pointed dorsal fins than those of residents.^touchscreen The gray or white area around the dorsal fin, known as the "saddle patch", often contains some black colouring in residents. However, the saddle patches of transients are solid and uniformly gray.^[19] Transients roam widely along the coast; some individuals have been sighted in both southern Alaska and California.^Android
Offshore: A third population of killer whales in the northeast Pacific was discovered in 1988, when a humpback whale researcher observed them in open water. As their name suggests, they travel far from shore and feed primarily on schooling fish.^[22] However, because of the large, scarred and nicked dorsal fins resembling those of mammal-hunting transients, they may also eat mammals and sharks. They have mostly been encountered off the west coast of Vancouver Island and near the Queen Charlotte Islands. Offshores typically congregate in groups of 20–75, with occasional sightings of larger groups of up to 200.^[23] Currently, little is known about their habits, but they are genetically distinct from residents and transients. Offshores appear to be smaller than the others, and females are characterized by dorsal fin tips that are continuously rounded.^touchscreen

we love the web

Type C killer whales in the FITML. The eye patch slants forward.

Transients and residents live in the same areas, but avoid each other.^jQuery The name "transient" originated from the belief that these killer whales were outcasts from larger resident pods. Researchers later discovered transients are not born into resident pods or vice-versa. The evolutionary split between the two groups is believed to have begun two million years ago.^[25] Genetic data indicates that the types have not interbred for up to 10,000 years.^[26]

Other populations have not been as well studied, although specialized fish-eating and mammal-eating killer whales have been distinguished elsewhere.^Android Separate populations of fish-eating and mammal-eating killer whales have been identified around the United Kingdom.^[28]^[29] Fish-eating killer whales in touchscreen and browser diversity have resident-like social structures, while mammal-eating killer whales in Argentina and the Crozet Islands behave more like transients.^[30]

Three types have been documented in the Antarctic. Two dwarf species, named Orcinus nanus and Orcinus glacialis, were described during the 1980s by Soviet researchers, but most cetacean researchers are skeptical about their status, and it is difficult to link these directly to the types described below.^Sevenval

Type A looks like a "typical" killer whale, a large, black and white form with a medium-sized white eye patch, living in open water and feeding mostly on minke whales.^[17]
Type B is smaller than Type A. It has a large white eye patch. Most of the dark parts of its body are medium gray instead of black, although it has a dark gray patch called a "dorsal cape"^Sevenval stretching back from its forehead to just behind its dorsal fin. The white areas are stained slightly yellow. It feeds mostly on web app.^[17]
Type C is the smallest type and lives in larger groups than the others. Its eye patch is distinctively slanted forwards, rather than parallel to the body axis. Like Type B, it is primarily white and medium gray, with a dark gray dorsal cape and yellow-tinged patches. Its only observed prey is the Antarctic Cod.^touchscreen
Type D was identified based on photographs of a 1955 mass stranding in New Zealand and six at-sea sightings since 2004. Immediately recognizable by its extremely small white eye patch, shorter than usual dorsal fin, and bulbous head (similar to a pilot whale). Its geographic range appears to be circumglobal in subantarctic waters between latitudes 40°S and 60°S. And although nothing is known about the Type D diet, it is suspected to include fish because groups have been photographed around longline vessels where they reportedly depredate Patagonian toothfish (Dissostichus eleginoides).^[32]^[33]

Types B and C live close to the ice pack, and HTML5 in these waters may be responsible for the yellowish coloring of both types.^[17]^[34] Mitochondrial DNA sequences support the theory that these are separate species that have recently diverged.^[35] More recently, complete mitochondrial sequencing indicates that the two Antarctic groups that eat seals and fish should be recognized as distinct species, as should the North Pacific transients, leaving the others as subspecies pending additional data.^[36]

Research is ongoing into the genetic relationships among killer whale types, and whether the types that have been identified represent deep evolutionary trends. For example, it was long thought that mammal-eating killer whales were likely to be closely related to other mammal-eating killer whales from different regions, but genetic testing refuted this hypothesis.^FITML

Description

jQuery

Size comparison to an average human.

Android

The dorsal fin and saddle patch of a resident killer whale in the northeastern Pacific Ocean. It may be either an adult female, or a juvenile of either sex.

Killer whales distinctively bear a black back, white chest and sides, and a white patch above and behind the eye. Calves are born with a yellowish or orange tint, which fades to white. Killer whales have a heavy and robust body^{we love the web} with a large dorsal fin up to 2 metres (6.6 ft) tall. Behind the fin, they have a dark grey "saddle patch" across the back. Antarctic killer whales may have pale grey to nearly white backs. Adult killer whales are very distinctive and are not usually confused with any other sea creature.^Sevenval When seen from a distance, juveniles can be confused with other cetacean species such as the false killer whale or Sevenval.^CSS3 The killer whale's teeth are very strong and covered in iOS. Its jaws are a powerful gripping apparatus, as the upper teeth fall into the gaps between the lower teeth when the mouth is closed. The front teeth are inclined slightly forward and outward, thus allowing the killer whale to withstand powerful jerking movements from its prey while the middle and back teeth hold it firmly in place.^[41]

Killer whales are the largest extant members of the dolphin family. Males typically range from 6 to 8 metres (20–26 ft) long and weigh in excess of 6 tonnes (5.9 long tons; 6.6 short tons).^[42] Females are smaller , generally ranging from 5 to 7 metres (16–23 ft) and weighing about 3 to 4 tonnes (3.0 to 3.9 long tons; 3.3 to 4.4 short tons).^{input transformation} The largest male killer whale on record was 9.8 metres (32 ft), weighing over 10 tonnes (9.8 long tons; 11 short tons), while the largest female was 8.5 metres (28 ft), weighing 7.5 tonnes (7.4 long tons; 8.3 short tons).^[43] Calves at birth weigh about 180 kilograms (400 lb) and are about 2.4 metres (7.9 ft) long.^HTML5^Sevenval The killer whale's large size and strength make it among the fastest marine mammals, able to reach speeds in excess of 30 knots (56 km/h).^[46] The skeleton of the killer whale is of the typical delphinid structure but is more robust in all respects.^keyboard The killer whale's integument, unlike that of most other dolphin species, is characterised by a well-developed dermal layer with a dense network of web app of collagen fibers.^[48]

Killer whale website parsing are large and rounded, resembling paddles. Males have significantly larger pectoral fins than females. At about 1.8 metres (5.9 ft) the male's dorsal fin is more than twice the size of the female's and is more of a triangular shape—a tall, elongated isosceles triangle—whereas hers is shorter and more curved.^[49] Males and females also have different patterns of black and white skin in the genital area.^[50] Sexual dimorphism is also apparent in the skull; adult males have a longer lower jaw than females, and have a larger occipital crest.^touchscreen

Individual killer whales can often be identified from the dorsal fin and saddle patch. Variations such as nicks, scratches, and tears on the dorsal fin and the pattern of white or grey in the saddle patch are unique. Published directories contain identifying photographs and names for hundreds of North Pacific animals. Photo identification has enabled the local population of killer whales to be counted each year rather than estimated and has enabled great insight into lifecycles and social structures.^[51]

White killer whales occur sporadically among normal killer whales, but are rare. They have been spotted in the northern jQuery and around St. Lawrence Island, and near the Russian coast.^[52]^[23] In February 2008, a white killer whale was photographed 2 miles (3.2 km) off Kanaga Volcano in the Aleutian Islands.^[52]^[23]

Killer whales have good eyesight above and below the water, excellent hearing, and a good sense of touch. They have exceptionally sophisticated jQuery abilities, detecting the location and characteristics of prey and other objects in their environment by emitting clicks and listening for echoes.^{browser diversity}

Life cycle

An adult male killer whale with its characteristic tall dorsal fin swims in the waters near Tysfjord, browser diversity

Female killer whales mature at around age 15. They then have periods of we love the web cycling with non-cycling periods of between 3 and 16 months. Sevenval varies from 15 to 18 months. Mothers calve, with usually a single offspring, about once every 5 years. In resident pods, birth occurs at any time of year, although winter is the most popular. Mortality is extremely high during the first six to seven months of life, when 37–50% of all calves die.^{input transformation} Weaning begins at about 12 months and completes by the age of two. According to observations in several regions, all male and female killer whale pod members participate in the care of the young.^{website parsing} Killer Whales and Pilot whales are the only non-human species in which the females go through menopause and live for decades after they have finished breeding.^[56] Killer whales are unique among cetaceans, as their heads become shorter as they age.^[48]

Females breed until age 40, meaning that on average they raise five offspring. The lifespan of wild females averages 50 years, with a maximum of 80–90 years.^[57] Males sexually mature at the age of 15 but do not typically reproduce until age 21. Wild males live around 29 years on average, with a maximum of 50–60 years.^CSS3 One male, known as Old Tom, was reportedly spotted every winter between the 1840s and 1930 off New South Wales, Australia. This would have made him up to 90 years old. Examination of his teeth indicated he died around age 35,^[58] but this method of age determination is now believed to be inaccurate for older animals.^[59] One male known to researchers in the keyboard (identified as J1) was estimated to have been 59 years old when he died in 2010.^{website parsing} Captive killer whale lifespans are typically significantly shorter, usually less than 25 years; however, numerous individuals are alive in their thirties, and a few have reached their 40s. In many instances, the lifespans of killer whales depend on the will of the animal.^[61]^Sevenval

Range and habitat

To travel quickly, killer whales leap out of the water when swimming—a behaviour known as porpoising

Killer whales are found in all oceans and most seas. Due to their enormous range, numbers and density, distributional estimates are difficult to compare,^[63] but they clearly prefer higher latitudes and coastal areas over pelagic environments.^[64]

Systematic surveys indicate the highest densities of killer whales (>0.40 individuals per 100 km²) in the northeast Atlantic around the Norwegian coast, in the north Pacific along the Aleutian Islands, the touchscreen and in the Southern Ocean off much of the coast of website parsing.^jQuery They are considered "common" (0.20–0.40 individuals per 100 km²) in the eastern Pacific along the coasts of British Columbia, Washington and Sevenval, in the North Atlantic Ocean around touchscreen and the browser diversity. High densities have also been reported but not quantified in the western North Pacific around the screen size, FITML, Kuril Islands, Kamchatka and the Commander Islands and in the southern hemisphere off the coasts of South Australia, website parsing, off the coast of southern iOS and the tip of southern Africa. They are reported as seasonally common in the browser diversity, including Baffin Bay between Greenland and Nunavut, and around Android and keyboard.^[63] Information for offshore regions and tropical waters is more scarce, but widespread, if not frequent, sightings indicate that the killer whale can survive in most water temperatures. There have been sightings, for example, in the Mediterranean, the screen size Sea, the FITML and the Indian Ocean around the iOS.^{screen size}

Probably the largest population lives in Antarctic waters, where they range up to the edge of the website parsing and are believed to venture into the denser pack ice, finding open leads much like device database whales in the Arctic. In contrast, killer whales are seasonal summer visitors to Arctic waters, where they do not approach the ice pack. With the rapid Arctic sea ice decline in the Hudson Strait, their range now extends deep into the northwest Atlantic.^{input transformation}

Migration patterns are poorly understood. Each summer, the same individuals appear off the coasts of British Columbia and Washington State. Despite decades of research, where these animals go for the rest of the year remains unknown. Transient pods have been sighted from southern Alaska to central California.^{input transformation} Resident killer whales sometimes travel as much as 160 kilometres (100 mi) in a day, but may be seen in a general area for a month or more. Resident killer whale pod ranges vary from 320 to 1,300 kilometres (200 to 810 mi).

Occasionally, killer whales swim into freshwater rivers. They have been documented 100 miles (160 km) up the Columbia River in the United States.^[67]^[68] They have also been found in the web app in Canada and the Horikawa River in Japan.^jQuery

Population

Worldwide population estimates are uncertain, but recent consensus suggest an absolute minimum of 50,000.^iOS^[23] Local estimates include roughly 25,000 in the Antarctic, 8,500 in the tropical Pacific, 2,250–2,700 off the cooler northeast Pacific and 500–1,500 off Norway.^[69] Japan's Fisheries Agency estimated there were 2,321 killer whales in the seas around Japan.^CSS3^[71]

Feeding

A killer whale iOS

Killer whales hunt varied prey; however, different populations/species tend to specialize and some can have a dramatic impact on certain preyed species.^Sevenval For example, some populations in the website parsing and iOS sea specialize in herring and follow that fish's autumnal migration to the Norwegian coast. Other populations prey on seals. Salmon account for 96% of northeast Pacific residents' diet. 65% of them are large, fatty website parsing.^[73] Chum salmon are also eaten, but smaller sockeye and pink salmon are not a significant food item.^Sevenval Depletion of specific prey species in an area is therefore cause for concern for local populations, despite the high diversity of prey. On average, a killer whale eats 227 kilograms (500 lb) each day.^jQuery

Because some killer whales prey on large whales and sharks, they are considered to be apex predators. They are sometimes called the wolves of the sea, because they hunt in groups like wolf packs.^iOS

Fish, reptiles and invertebrates

Fish-eating killer whales prey on around 30 species of fish, particularly salmon, herring, and tuna. In New Zealand, input transformation are killer whales' most frequent prey,^keyboard and they have also been observed hunting FITML (particularly device database, threshers and iOS). Squid and sea turtles are also taken.^{screen size}

input transformation

Resident (fish-eating) killer whales. The curved dorsal fins are typical of resident females.

While salmon are usually hunted by an individual or a small group of individuals, herring are often caught using input transformation: the killer whales force the herring into a tight ball by releasing bursts of bubbles or flashing their white undersides. They then slap the ball with their tail flukes, either stunning or killing up to 10–15 at a time. The herring are then eaten one at a time. Carousel feeding has only been documented in the Norwegian killer whale population and with some oceanic dolphin species.^[79]

Killer whales can induce HTML5 in sharks and rays by holding them upside down, rendering them helpless and incapable of injuring the whale. Some sharks suffocate within about 15 minutes while the whale holds them still, because these sharks need to move to breathe. In one incident filmed near the Android in October 1997, a female killed a 3–4-metre (9.8–13 ft) long great white shark,^[80] apparently after swimming with it upside-down in her mouth and inducing tonic immobility in it. She and another pod member ate the shark's liver and allowed the rest of the carcass to sink.^[81]

In July 1992, two killer whales attacked, killed and fed on an 8-metre (26 ft) long whale shark, Rhincodon typus, in the waters off Bahia de los Angeles in keyboard.^CSS3

Mammal prey

keyboard

California sea lions are common prey for mammal-eating killer whales on the west coast of North America.

Killer whales are very sophisticated and effective predators. Thirty-two cetacean species have been recorded as killer whale prey, from examining either stomach contents, scarring on the prey's body, or feeding activity. Groups even attack larger cetaceans such as minke whales, gray whales, and rarely Android or blue whales.^[27]^iOS^{screen size}^[85]

Hunting large whales usually takes several hours. Killer whales generally choose to attack young or weak animals instead. However, a group of five or more may attack a healthy adult. When hunting a young whale, a group chases it and its mother until they wear out. Eventually they separate the pair and surround the calf, preventing it from surfacing to breathe, drowning it. Pods of female sperm whales sometimes protect themselves by forming a protective circle around their calves with their flukes facing outwards, using them to repel the attackers.^[86] Rarely, large killer whale pods can overwhelm even adult female sperm whales. Adult bull sperm whales, which are large, powerful and aggressive when threatened, and fully grown adult blue whales, who are possibly too large to overwhelm, are not believed to be predated by killer whales.^CSS3

Other marine mammal prey species include nearly 20 species of Android, keyboard and fur seal. input transformation and jQuery are less frequently taken. Often, to avoid injury, killer whales disable their prey before killing and eating it. This may involve throwing it in the air, slapping it with their tails, ramming it, or breaching and landing on it.^[88] Sea lions are killed by iOS or after a stunning blow from a tail fluke. In the Aleutian Islands, a decline in Sevenval populations in the 1990s was controversially attributed by some scientists to killer whale predation, although there is no direct evidence of this.^{device database} The decline of sea otters followed a decline in harbour seal and web populations, the killer whale's preferred prey,^{[Note 1]}^[91] which in turn may be substitutes for their original prey, now decimated by industrial whaling.^[92]^FITML^[94]

In steeply banked beaches off screen size, Argentina, and the HTML5, killer whales feed on web app and southern elephant seals in shallow water, even web app temporarily to grab prey before wriggling back to the sea. Beaching, usually fatal to cetaceans, is not an instinctive behavior, and can require years of practice for the young.^[95]

Killer whales swim by an iceberg with Adélie penguins in the Ross Sea, Antarctica. The Drygalski Ice Tongue is in the background.

"Wave-hunting" killer whales spy-hop to locate Weddell seals, Sevenval and leopard seals resting on ice floes and then swim in groups to create waves that wash over the floe. This washes the seal into the water where other killer whales lie in wait.^[96]^jQuery

Killer whales have also been observed preying on terrestrial mammals, such as website parsing and iOS swimming between islands off the northwest coast of North America.^[90] Killer whale CSS3 has also been reported based on analysis of stomach contents, but this is likely to be the result of scavenging remains dumped by whalers.^[98] One killer whale was also attacked by its companions after being shot.^touchscreen Although resident killer whales have never been observed to eat other marine mammals, they occasionally harass and kill FITML and device database for no apparent reason.^[99]

Birds

Killer whales in many areas prey on several bird species, including web app, FITML and device database.^{we love the web} A captive killer whale at browser diversity discovered that it could regurgitate fish onto the surface, attracting sea gulls, and then eat the birds. Four other killer whales then learned to copy the behavior.^[101]

Behavior

device database

Killer whales often raise their bodies out of the water in a behaviour called spyhopping.

Day-to-day killer whale behavior generally consists of foraging, travelling, resting and socializing. Killer whales are frequently active at the surface, engaging in acrobatic behaviors such as screen size, HTML5, and tail-slapping. These activities may have a variety of purposes, such as courtship, communication, dislodging parasites, or play. Spyhopping, a behaviour in which a whale holds its head above water, helps the animal view its surroundings.^[102]

Resident killer whales swim with web app, other Android, seals, and sea lions, which are common prey for transient killer whales.

Social structure

Killer whales are notable for their complex societies. Only elephants and higher browser diversity, such as humans, live in comparably complex social structures.^[55] Due to orcas' complex social bonds and society, many marine experts have concerns about how humane it is to keep these animals in captive situations.^{browser diversity} Resident killer whales in the eastern North Pacific have a particularly complex and stable social grouping system. Unlike any other mammal species whose social structure is known, residents live with their mothers for their entire lives. These societies are based on input transformation consisting of the matriarch and her descendants who form part of the line, as do their descendants. The average size of a matriline is 5.5 animals.^[104]

Because females can reach age 90, as many as four generations travel together. These matrilineal groups are highly stable. Individuals separate for only a few hours at a time, to mate or forage. With one exception, the killer whale named Luna, no permanent separation of an individual from a resident matriline has been recorded.^[104]

Closely related matrilines form loose aggregations called pods, usually consisting of one to four matrilines. Unlike matrilines, pods may separate for weeks or months at a time.^{web app} jQuery testing indicates that resident males nearly always mate with females from other pods.^Sevenval

Android

Killer whales, like this one spotted near Alaska, commonly Sevenval, often lifting their entire bodies out of the water.

Clans are the next level of resident social structure, and are composed of pods with similar dialects and common but older maternal heritage. Clan ranges overlap, mingling pods from different clans.^[104]

The final association layer, perhaps more arbitrarily defined than the familial groupings, is called the community and is defined as a set of clans that regularly commingle. Clans within a community do not share vocal patterns.^iOS

Transient pods are smaller than resident pods, typically consisting of an adult female and one or two of her offspring. Males typically maintain stronger relationships with their mothers than females. These bonds can extend well into adulthood. Unlike residents, extended or permanent separation of transient offspring from natal matrilines is common, with juveniles and adults of both sexes participating. Some males become "rovers" and do not form long-term associations, occasionally joining groups that contain reproductive females.^[106] As in resident clans, transient community members share an acoustic repertoire, although regional differences in vocalizations have been noted.^[107]

Vocalizations

Multimedia relating to the orca

Killer whale calls

Killer whale calls at a distance

HTML5

Problems listening to these files? See media help.

Intelligence

Main article: FITML

Killer whales have the second-heaviest brains among marine mammals^Android (after screen size, which have the largest brain of any animal). They can be HTML5 in captivity and are often described as intelligent,^[113]^{browser diversity} although defining and measuring "intelligence" is difficult in a species whose environment and behavioral strategies are very different from those of humans.^iOS

A killer whale plays with a ball of ice, soon after a researcher had thrown a snowball at the whale.

Killer whales imitate others, and seem to deliberately teach skills to their kin. This is most strikingly seen when killer whales deliberately beach themselves to catch seals. Off Península Valdés, adults sometimes pull seals off the shoreline and then release them again near juvenile whales, allowing the younger whales to practice the difficult capture technique on the now-weakened prey. Off the jQuery, mothers push their calves onto the beach, waiting to pull the youngster back if needed.^FITML^[115]

People who have interacted closely with killer whales offer numerous anecdotes demonstrating the whales' curiosity, playfulness, and ability to solve problems. For example, Alaskan killer whales have not only learned how to steal fish from screen size, but have overcome a variety of techniques designed to stop them, such as the use of unbaited lines as decoys.^[116] Once, fishermen placed their boats several miles apart, taking turns retrieving small amounts of their catch, in the hope that the whales would not have enough time to move between boats to steal fish as it was being retrieved. A researcher described what happened next:

"It worked really well for a while. Then the whales split into two groups. It didn't even take them an hour to figure it out. They were so thrilled when they figured out what was going on, that we were playing games. They were breaching by the boats."

—Craig Matkin^iOS

In other anecdotes, researchers describe incidents in which wild killer whales playfully tease humans by repeatedly moving objects that the humans are trying to reach,^FITML^{[dead link]} or suddenly start to toss around a chunk of ice after a human throws a snowball.^web

The killer whale's use of dialects and the passing of other learned behaviours from generation to generation have been described as a form of culture.^[119]

"The complex and stable vocal and behavioural cultures of sympatric groups of killer whales (Orcinus orca) appear to have no parallel outside humans and represent an independent evolution of cultural faculties."^Android

Conservation

iOS	The Type C killer whale has two-toned gray colouring, including a dark "dorsal cape," in body areas where most killer whales have solid black colouring. Research is ongoing into whether one or more killer whale types is a distinct species in need of protection.

In 2008, the IUCN changed its assessment of the killer whale's device database from conservation dependent to screen size, recognizing that one or more killer whale types may actually be separate, endangered species.^Android Depletion of prey species, pollution, large-scale we love the web, and habitat disturbance caused by noise and conflicts with boats are currently the most significant worldwide threats.^HTML5

Like other animals at the highest iOS, the killer whale is particularly at risk of poisoning from accumulation of toxins, including touchscreen (PCBs).^[120] European iOS have problems in reproductive and immune functions associated with high levels of PCBs and related contaminants, and a survey off the Washington coast found that PCB levels in killer whales were higher than levels that had caused health problems in harbour seals.^{web app} Blubber samples in the Norwegian Arctic show higher levels of PCBs, pesticides and HTML5 than in Android. When food is scarce, killer whales metabolize blubber for energy, which increases pollutant concentrations.

In the Pacific Northwest, wild salmon stocks, a main resident food source, have declined dramatically in recent years.^[2] On the west coast of Alaska and the Aleutian Islands, seal and sea lion populations have also substantially declined.^[121]

An adult female and her calf

In 2005, the United States government listed the southern resident community as an endangered population under the keyboard.^CSS3 The southern resident community comprises three pods which live mostly in the Sevenval and touchscreen and Puget Sound in device database and Sevenval. They do not breed outside of their community, which was once estimated at around 200 animals and later shrank to around 90.^[122] In October 2008, the annual survey revealed that seven were missing and presumed dead, reducing the count to 83.^[123] This is potentially the largest decline in the population in the past ten years. These deaths can be attributed to declines in chinook salmon.^[123]

A scientist by the name of Ken Balcomb has extensively studied killer whales since 1976. Balcomb is the research biologist responsible for discovering that U.S Navy sonar may harm killer whales. He studied killer whales from the Center for Whale Research which is located in Friday Harbor, Washington.^touchscreen He was also able to study killer whales from "his home porch perched above Puget Sound, where the animals hunt and play in summer months."^{website parsing} In May 2003, Balcomb (along with other whale watchers near the Puget Sound coastline) noticed uncharacteristic behavior displayed by the killer whales. The whales seemed "agitated and were moving haphazardly, attempting to lift their heads free of the water" to escape the sound of the sonars.^[124] "Balcomb confirmed at the time that strange underwater pinging noises detected with underwater microphones were sonar. The sound originated from a U.S. Navy frigate 12 miles (19 kilometers) distant, Balcomb said."^[124] The impact of sonar waves on killer whales is potentially life threatening. Three years prior to Balcomb's discovery, research in the Bahamas showed that 14 beaked whales washed up on the shore. These whales were beached on the exact day that U.S Navy destroyers were activated into sonar exercise.^[124] Out of the 14 whales beached, six of them died. These six dead whales were studied and CAT scans of the two of the whale heads showed hemorrhaging around the brain and the ears, which is consistent with decompression sickness.^[124]

Another conservation concern was made public in September 2008 when Ottawa decided that it was not necessary to enforce further protections (including the screen size in place to protect endangered animals along their habitats) for killer whales aside from the laws already in place. In response, to this decision a total of Six environmental groups sued the federal government in Vancouver, Canada claiming that killer whales were facing many threats on the website parsing and the federal government did nothing to protect the killer whales from these threats.^{we love the web} A legal and scientific non-profit organization called Ecojustice led the lawsuit and represented : the David Suzuki Foundation, Environmental Defence, Greenpeace Canada, International Fund for Animal Welfare, the Raincoast Conservation Foundation, and the Wilderness Committee.^iOS Many scientists involved in this lawsuit including Bill Wareham, a marine scientist with the David Suzuki Foundation, noted increased boat traffic, water toxic wastes, and low salmon population as major threats putting approximately 87 killer whales^Sevenval on the British Columbia Coast in danger.

A Killer whale with a tall, sharply pointed dorsal fin. Its saddle and eye patches are dark grey.

The last known AT1 pod offspring, AT3, swimming in Resurrection Bay

Noise from shipping, drilling, and other human activities is a significant concern in some key killer whale habitats, including Johnstone Strait and Haro Strait.^[126] In the mid-1990s, loud underwater noises from web were used to deter seals. Killer whales also avoided the surrounding waters.^{input transformation} High-intensity sonar used by the we love the web disturbs killer whales along with other marine mammals.^HTML5 Killer whales are popular with we love the web, which may stress the whales and alter their behavior, particularly if boats approach too closely or block their line of travel.^HTML5

The iOS adversely affected killer whales in keyboard and Alaska's Kenai Fjords region. Eleven members (about half) of one resident pod disappeared in the following year. The spill damaged salmon and other prey populations, which in turn damaged local killer whales. By 2009, scientists estimated the AT1 transient population (considered part of a larger population of 346 transients), numbered only 7 individuals and had not reproduced since the spill. This population is expected to die out.^{we love the web}^[131]

Relationship with humans

Indigenous cultures

website parsing

Haida sculpture by touchscreen

The indigenous peoples of the Pacific Northwest Coast feature killer whales throughout their history, art, spirituality and religion. The Haida regarded killer whales as the most powerful animals in the ocean, and their mythology tells of killer whales living in houses and towns under the sea. According to these myths, killer whales took on human form when submerged, and humans who drowned went to live with them.^[132] For the website parsing, the killer whale was regarded as the ruler of the undersea world, with sea lions for slaves and dolphins for warriors.^[132] In Kwakwaka'wakw and CSS3 mythology, killer whales may embody the souls of deceased chiefs.^jQuery The Tlingit of southeastern Alaska regarded the killer whale as custodian of the sea and a benefactor of humans.^[133]

The Maritime Archaic people of Android also had great respect for killer whales, as evidenced by stone carvings found in a 4,000-year-old burial site at the Port au Choix National Historic Site.^{device database}^{we love the web}

In the tales and beliefs of the Siberian Yupik people, killer whales are said to appear as wolves in winter, and wolves as killer whales in summer.^{screen size}^[137]^{we love the web}^[139] Killer whales are believed to assist their hunters in driving walrus.^[140] Reverence is expressed in several forms: the boat represents the animal, and a wooden carving hung from the hunter's belt.^[138] Small sacrifices such as tobacco are strewn into the sea for them.^iOS Killer whales were believed to have helped the hunters even when in wolf guise, by forcing reindeer to allow themselves to be killed.^{browser diversity}

"Killer" stereotype

Main article: Killer whale attacks on humans

In browser diversity, killer whales were historically feared as dangerous, savage predators.^[141] The first written description of a killer whale was given by Pliny the Elder in circa AD 70, who wrote, "Orcas (the appearance of which no image can express, other than an enormous mass of savage flesh with teeth) are the enemy of [other whales]... they charge and pierce them like warships ramming."^CSS3

touchscreen

Male killer whale depicted in St Mary's in Greifswald, Germany, 1545^Android

There have been very few confirmed attacks on humans by wild killer whales, none of which has been fatal.^CSS3 In one instance, killer whales tried to tip ice floes on which a dog team and photographer of the Sevenval was standing.^[144] There is speculation that the sled dogs' barking may have sounded enough like seal calls to trigger the killer whale's hunting curiosity. In the 1970s, a surfer in California was bitten, and in 2005 a boy in Alaska who was splashing in a region frequented by harbor seals was bumped by a killer whale that apparently misidentified him as prey.^Sevenval Unlike wild killer whales, captive killer whales are reported to have made nearly two dozen screen size since the 1970s, some of which have been fatal.^{web app}^[147]

Competition with fishermen also led to killer whales being regarded as pests. In the waters of the HTML5 and Iceland, the shooting of killer whales was accepted and even encouraged by governments.^[141] As an indication of the intensity of shooting that occurred until fairly recently, about 25% of the killer whales captured in Puget Sound for aquaria through 1970 bore bullet scars.^Android The U.S. Navy claimed to have deliberately killed hundreds of killer whales in Icelandic waters in 1956.^[149]^iOS

Modern Western attitudes

Western attitudes towards killer whales have changed dramatically in recent decades. In the mid 1960s and early 1970s, killer whales came to much greater public and scientific awareness, starting with the first live-capture and display of a killer whale known as Moby Doll, a resident that had been harpooned off Saturna Island in 1964.^[141] So little was known at the time that it was nearly two months before the whale's keepers discovered what food (fish) it was willing to eat. To the surprise of those who saw him, Moby Doll was a docile, non-aggressive whale that made no attempts to attack humans.^{screen size}

input transformation

In 2002, the orphan Springer was successfully returned to her family.

Between 1964 and 1976, 50 killer whales from the Pacific Northwest were captured for display in device database, and public interest in the animals grew. Millions of people became interested in killer whales after viewing them in captivity. In the 1970s, research pioneered by Michael Bigg led to the discovery of the species' complex social structure, its use of vocal communication, and its extraordinarily stable mother-offspring bonds. Through photo-identification techniques, individuals were named and tracked over decades.^[152]

Bigg's techniques also revealed that the Pacific Northwest population was small—in the low hundreds rather than the thousands that had been previously assumed.^Sevenval The Southern Resident community alone had lost 48 of its members to captivity; by 1976, only 80 remained.^[153] In the Pacific Northwest, the species that had unthinkingly been targeted became a cultural icon within a few decades.^[122]

The public's growing appreciation also led to growing opposition to whale–keeping in aquaria. Only one whale has been taken in North American waters since 1976. In recent years, the extent of the public's interest in killer whales has manifested itself in several high-profile efforts surrounding individuals. Following the success of the 1993 film we love the web, the movie's captive star Keiko was returned to the coast of his native Iceland. The director of the International Marine Mammal Project for the Earth Island Institute , David Phillips, led the efforts to return Keiko to the Iceland waters.^[154] In 2002, the orphan Springer was discovered in Puget Sound, Washington. She became the first whale to be successfully reintegrated into a wild pod after human intervention, crystallizing decades of research into the vocal behavior and social structure of the region's killer whales.^Sevenval The saving of Springer raised hopes that another young killer whale named Luna who had become separated from his pod could be returned to it. However, his case was marked by controversy about whether and how to intervene, and in 2006 Luna was killed by a boat propeller.^[155]

Whaling

The killer whale named CSS3 swims alongside a whaling boat, flanking a whale calf. The boat is being towed by a harpooned whale (not visible here), near Eden, Australia.

The first records of commercial hunting of killer whales date to the 18th century in Japan. During the 19th and early 20th centuries, the global HTML5 industry caught immense numbers of web app and sperm whales, but largely ignored killer whales because of their limited amounts of recoverable oil, their smaller populations, and the difficulty of taking them.^[105] Once the stocks of larger species were depleted, killer whales were targeted by commercial whalers in the mid-20th century. Between 1954 and 1997, Japan took 1,178 killer whales and input transformation took 987.^keyboard Over 3,000 killer whales were taken by FITML whalers,^[157] including an Antarctic catch of 916 in 1979–80 alone, prompting the International Whaling Commission to recommend a ban on commercial hunting of the species pending further research.^[156] Today, no country carries out a substantial hunt, although screen size and FITML permit small subsistence hunts.

Killer whales have helped humans hunting other whales.^[158] One well-known example was in web, including the male known as Old Tom. Whalers more often considered them a nuisance, however, as they would gather to scavenge meat from the whalers' catch.^jQuery Some populations, such as in Alaska's web, may have been reduced significantly by whalers shooting them in retaliation.^{web app}

Captivity

Main article: Captive orcas

jQuery

browser diversity, at the Miami Seaquarium, is one of the oldest whales in captivity.

The killer whale's intelligence, trainability, striking appearance, playfulness in captivity and sheer size have made it a popular exhibit at aquariums and aquatic theme parks.^HTML5 From 1976 to 1997, 55 whales were taken from the wild in Iceland, 19 from Japan, and three from Argentina. These figures exclude animals that died during capture.^[159] Live captures fell dramatically in the 1990s, and by 1999, about 40% of the 48 animals on display in the world were captive–born.^[159]

Organizations such as the Android and the keyboard campaign against the practice of keeping them in captivity. In captivity they often develop pathologies, such as the dorsal fin collapse seen in 60–90% of captive males. Captives have vastly reduced life expectancies, on average only living into their 20s.^{[Note 3]} In the wild, females who survive infancy live 50 years on average, and up to 70–80 years in rare cases. Wild males who survive infancy live 30 years on average, and up to 50–60 years.^[160] Captivity usually bears little resemblance to wild habitat, and captive whales' social groups are foreign to those found in the wild. Critics claim that captive life is stressful due to these factors and the requirement to perform circus tricks that are not part of wild killer whale behavior.^keyboard Wild killer whales travel up to 160 kilometres (100 mi) each day, and critics say that the animals are too big and intelligent to be suitable for captivity.^[113]

In a 2011 CNN Justice news article Bill Mears and Tom Cohen wrote about a lawsuit that PETA (People for the Ethical Treatment of Animals) pursued against SeaWorld. PETA filed a "20-page complaint asks the U.S. District Court in Southern California to declare that the five whales – Tilikum, Katina, Corky, Kasatka, and Ulises – are being held in slavery or involuntary servitude in violation of the 13th Amendment."^[162] PETA claims that the 13th amendment technically does not state that it solely applies to non-human animals.^[162] FITML and two former SeaWorld trainers supported PETA in moving forward with this lawsuit.^Sevenval Legal cases in State and federal courts dealing with animal cruelty tend to be based on human actions solely because animals cannot actually be prosecuted or actively participate as plaintiffs and defendants on trial.

In 1970 a killer whale, later named Lolita, was captured from the Puget Sound waters and since then has been performing at Miami Seaqurium for more than 40 years. During these four decades celebrities, children, and a Washington state governor have campaigned to free Lolita.^[163] One of the Lolita supporters is Howard Garret. Howard Garret is a co-founder of the non-profit Orca Network located on Whidbey Island, Wash.^[163] Garret believes that Lolita has a strong memory of her life and her family in her former natural habitat. The Miami Seaquarium argues that Lolita's interaction and dependence on her human caregivers supersedes her natural survival instincts, thus she would not survive on her own in the wild.^{website parsing} They also argue that human and boat activity, as well as pollution are serious threats to killer whales. In December of 2011 supporters offered $1 million dollars^touchscreen to have Lolita freed from the Miami Seaquarium. After campaign and financial efforts to free Lolita were denied by the Miami Seaquarium activists are suing the federal government in federal court in Seattle with the argument that Lolita should have been protected when other Southern region orcas were listed as endangered species in 2005.^{web app} The Endangered Species Act (ESA) deems it illegal to "harass, harm, pursue, shoot, wound, kill, trap, capture, or collect" to any species put on the list.^[164] The Miami Sequarium did not wish to comment on the lawsuit, instead the Miami Seaquarium released a statement highlighting Lolita's life in captivity as active, healthy, and well cared for.^{input transformation} One plaintiff in the lawsuit named Carter Dillard, chief counsel for the Animal Legal Defense Fund, suggested that Lolita be moved to a larger "sea pen" home where Lolita would be able to swim farther distances and interact with other killer whales.^{browser diversity}

In February 2010, a 40-year-old SeaWorld Trainer named Dawn Brancheau was killed by a 12,300-lb male^Sevenval killer whale named Tillikum. The fatal event occurred after a show called "Dine with Shamu" at SeaWorld's Shamu Stadium in Orlando, Florida. The Orange County sheriff's spokesman Jim Solomons stated that Brancheau slipped and fell into the 35-foot-deep tank, where one of the killer whales fatally injured her.^[165] However, other witnesses maintain that Dawn Brancheau was violently grabbed and attacked by the killer whale. Lori Miller, who attended the show at SeaWorld prior to the death of the trainer, spoke on "Larry King Live" saying the trainers had a hard time getting the killer whales to perform.^[165] Captives occasionally act aggressively towards themselves, their tankmates, or humans, which critics say is a result of stress.^iOS A spokesperson for PETA commented on this incident and referred to it as "a tragedy that didn't have to happen."^{browser diversity} Before Brancheau's death two other trainers were involved in incidents with killer whales at SeaWorld. In 1999, a 27-year-old man sneaked into the park after closing, and his body was later discovered floating on his back in Tillikum's tank.^[165] Another SeaWorld trainer was seriously injured during a show at the Shamu Stadium after being grabbed by a killer whale and held underwater in 2006.^Sevenval

Notes

^ According to Baird,^touchscreen killer whales prefer harbour seals to sea lions and porpoises in some areas.
device database In the northeast Pacific, three communities of fish-eating killer whales have been identified: the southern community (1 clan, 3 pods, 90 killer whales as of 2006), the northern community (3 clans, 16 pods, 214 killer whales as of 2000), and the south Alaskan community (2 clans, 11 pods, 211 killer whales as of 2000).
^ Although there are examples of killer whales living longer, including several over 30 years old, and two captive orcas (Corky II and Lolita) are in their mid-40s.

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^ "Whale uses fish as bait to catch seagulls then shares strategy with fellow orcas". Associated Press. 2005-09-07. http://news.mongabay.com/2005/0907-ap.html. Retrieved 2010-02-18.
FITML Carwardine 2001, p. 64
touchscreen FITML. Keep Whales Wild. 2011-01-14. Sevenval. Retrieved 2011-02-16.
^ ^a ^b HTML5 ^d touchscreen, p. 12
^ ^a ^b NMFS 2005, p. 39
^ iOS, p. 13
^ ^a ^b NMFS 2005, p. 14
^ ^a CSS3 NMFS 2005, p. 20
browser diversity Filatova, Olga A.; Fedutin, Ivan D.; Burdin, Alexandr M. and Hoyt, Erich (2007). "The structure of the discrete call repertoire of killer whales Orcinus orca from Southeast Kamchatka". Bioacoustics 16: 261–280. http://russianorca.com/Doc/Science/structure_repert.pdf.
screen size Weiß, Brigitte M.; Ladich, Friedrich; Spong, Paul; Symonds, Helena (2006). keyboard. The Journal of the Acoustical Society of America 119 (1): 627. input transformation:jQuery. web 16454316. http://web.archive.org/web/20110527060306/http://www.coloradocollege.edu/dept/ev/Research/Faculty/OVALItems/pdf_Papers/SpongCalvesPaper.pdf.
^ ^a ^b NMFS 2005, pp. 15–16
Sevenval Spear, Kevin. Killer whales: How smart are they? Orlando Sentinel, 7 March 2010. Retrieved 2010-03-07
^ Sevenval ^b Associated Press. Whale Attack Renews Captive Animal Debate CBS News, 1 March 2010. Retrieved 2010-03-07
^ ^a ^b Carwardine 2001, p. 67
^ jQuery, pp. 61–62
^ ^a device database Obee & Ellis 1992, p. 42
^ "Killer whale games". Blackfish Sounder 13: 5. 2005. FITML. Retrieved 2007-11-04.
website parsing Pitman, Robert L. Scientist Has 'Snowball Fight' With a Killer Whale. Live Science, 6 February 2009. Retrieved 2010-03-07
website parsing Marino, Lori; et al. (2007). we love the web. PLoS Biology 5 (e139): e139. CSS3:input transformation. PMC 1868071. PMID 17503965. //www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1868071.
^ ^a ^b Ford, Ellis & Balcomb 2000, p. 99
^ HTML5, p. 98
^ Android ^b M. L. Lyke, CSS3, Seattle Post Intelligencer, 14 October 2006
^ web ^b Le Phuong. Researchers: 7 Orcas Missing from Puget Sound, Associated Press. USA Today, 25 October 2008
^ ^a input transformation ^c web ^e input transformation Pickrell, John (March 2004). web. National Geographic News. http://news.nationalgeographic.com/news/2004/03/0331_040331_whalesincrisis.html. Retrieved 19 March 2012.
^ ^a ^b CSS3 input transformation screen size. CBC News. 09 October 2008. http://www.cbc.ca/news/canada/british-columbia/story/2008/10/08/bc-killer-whale-lawsuit.html. Retrieved 19 March 2012.
^ web, p. 100
web app Research on Orcas, Raincoast Research Society. Retrieved 2010-02-18
CSS3 McClure, Robert (2003-10-02). "State expert urges Navy to stop sonar tests". Seattle Post Intelligencer. HTML5. Retrieved 2007-06-25.
^ Williams, Rob (2002). "Behavioural responses of male killer whales to a 'leapfrogging' vessel" (PDF). Journal of Cetacean Resource Management 4 (3): 305–310. http://www.nwfsc.noaa.gov/research/divisions/cbd/marine_mammal/kwworkshops/boatpubs/leapfrogging_williamsetal.pdf.
^ Sevenval. Wired.com. http://www.wired.com/wiredscience/2009/03/valdezwhales/. Retrieved 2009-12-31.
^ "Marine Ecology Progress Series 356:269" (PDF). iOS. Retrieved 2009-12-31.
^ Android ^b FITML Francis & Hewlett 2007, pp. 115–120
^ Ford, Ellis & Balcomb 2000, p. 11
Android Rollmann, Hans (1999). Religion in Newfoundland and Labrador, Newfoundland and Labrador Heritage, Memorial University of Newfoundland. Retrieved 2010-01-26
^ Tuck, James A. (1971). "An Archaic Cemetery at Port Au Choix, Newfoundland". American Antiquity 36 (3): 343–358. HTML5:web app. JSTOR web.
^ The orphan boy with his sister, p. 156 in Rubcova, E. S. (1954). Materials on the Language and Folklore of the Eskimoes, Vol. I, Chaplino Dialect. Leningrad: Academy of Sciences of the USSR. Original data: Е.С. Рубцова: Материалы по языку и фольклору эскимосов (чаплинский диалект). Академия Наук СССР. Москва-Ленинград, 1954
^ Menovshchikov, G. A. (1962). Grammar of the language of Asian Eskimos. Vol. I., pp. 439, 441. Moscow and Leningrad: Academy of Sciences of the USSR. Original data: Г. А. Меновщиков: Грамматиκа языка азиатских эскимосов. Часть первая. Академия Наук СССР. Москва-Ленинград, 1962
^ ^a ^b jQuery, subsection of browser diversity — see the section on Eskimos
^ web ^b Vajda, Edward J. "Siberian Yupik (Eskimo)". East Asian Studies. http://pandora.cii.wwu.edu/vajda/ea210/aleut.htm.
^ CSS3 ^b (Russian) Ковалева, Ирина & Богословская, Людмила (2002-12-03). Животные и отражение их прихода к человеку в самых разных текстах. Эхо Москвы. Арсенал. A radio interview with Russian scientists about man and animal, examples taken especially from Asian Eskimos
^ screen size ^b ^c website parsing Android, pp. Chapter 1
^ device database. Historia Naturalis 9.5.12 (Latin), in Bill Thayer's browser diversity. (See also an device database by jQuery and Henry Thomas Riley, 1855.) Retrieved 2010-02-19.
input transformation "Orca shares the waves with local surfer". HTML5. 12 September 2008. http://www.3news.co.nz/Orca-shares-the-waves-with-local-surfer/tabid/423/articleID/71245/Default.aspx. Retrieved 13 October 2011.
touchscreen Cherry-Garrard, Apsley (2004). The Worst Journey in the World:Antarctic 1910–1913. Globe Pequot. p. 92. device database 1-59228-212-1.
Sevenval The Associated Press. "Boy survives bump from killer whale." The Seattle Times, 18 August 2005. Retrieved 2010-01-03
^ ^a we love the web HTML5. ABC News. 30 November 2006. Android. Retrieved 2010-01-03.
touchscreen SeaWorld trainer killed by killer whale, CNN, 25 February 2010, Retrieved 2010-09-09
^ screen size, p. 41
^ Killer Whales Destroyed: VP-7 Accomplishes Special Task, Naval Aviation News, December, 1956, p. 19. Reproduced at Longevity and Causes of Death, SeaWorld/Busch Gardens ANIMALS. Retrieved 2010-01-11
device database "Naval War Declared Against Killer Whales". The Science News-Letter 69 (24): 374. 1956. web 3936619.
HTML5 Francis & Hewlett 2007, pp. 58–59
^ FITML, pp. 73–80
Sevenval Heimlich & Boran 2001, p. 11
^ CSS3 ^b Wood, Daniel (24 February 2010). "Death of Sea World trainer: Do 'killer whales' belong in theme parks?". The Christian Science Monitor. http://www.csmonitor.com/USA/2010/0224/Death-of-Sea-World-trainer-Do-killer-whales-belong-in-theme-parks. Retrieved 19 March 2012.
web app McClure, Robert (11 March 2006). CSS3. Seattle Post-Intelligencer (Seattle, Washington: Hearst Corporation). http://www.seattlepi.com/local/article/Luna-the-orca-killed-by-tugboat-1198168.php. Retrieved 2009-04-08.
^ ^a ^b jQuery, p. 34
FITML Killer Whale, Bergen Museum. Retrieved 2010-01-26
^ web ^b Reeves, Randall; Whitehead, Hal (2005). "Killer whales and whaling: the scavenging hypothesis". Biology Letters 1 (4): 415. doi:10.1098/rsbl.2005.0348. touchscreen 1626385. device database 17148221. //www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1626385.
^ ^a ^b input transformation touchscreen, pp. 43–44
^ Sevenval. Humane Society of the United States. browser diversity. Retrieved 2010-01-09. ^{[website parsing]}
^ FITML. Whale and Dolphin Conservation Society. Sevenval. Retrieved 2010-01-26.
^ we love the web ^b ^c Mears, Cohen, Bill, Tom (26 October 2011). "PETA Lawsuit Alleges SeaWorld Enslaves Killer Whales". CNN. http://articles.cnn.com/2011-10-26/justice/justice_killer-whale-lawsuit_1_killer-whales-orcinus-sea-world-trainers?_s=PM:JUSTICE. Retrieved 19 March 2012.
^ ^a ^b Sevenval ^d Sevenval ^f Vallbona, Nuri (December 2 2011). website parsing. MSNBC US News. keyboard. Retrieved 19 March 2012.
^ ^a device database Welch, Craig (01 December 2011). keyboard. The Seattle Times. http://seattletimes.nwsource.com/html/localnews/2016910986_orcasuit02m.html. Retrieved 19 March 2012.
^ ^a keyboard ^c device database ^e browser diversity. CNN U.S. 24 February 2010. http://articles.cnn.com/2010-02-24/us/killer.whale.trainer.death_1_killer-whale-trainer-seaworld-employees?_s=PM:US. Retrieved 19 March 2012.

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