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Orca types and populations

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324:. These two types have now been dropped from the classification, because of a lack of samples for type 2 (5 individuals) and how little it was representative of a potential ecotype. Instead, recent studies using dietary tracers such as fatty acids and organic contaminants have shown how varied the diet of North Atlantic orcas is. For example, orcas in the Eastern North Atlantic (Norway, Faroe Islands, Iceland) mainly feed on fish, specifically herring. Meanwhile, those in the Central North Atlantic (Greenland) prefer to consume seals such as ringed, harp, hooded, and bearded seals. Finally, orcas in the Western North Atlantic (Eastern Canadian Arctic and Eastern Canada) tend to prey on other whale species, such as belugas and narwhals in the Arctic and baleen whales and porpoises in Eastern Canada. 186:. They live in the same areas as residents, but the two avoid each other. Transients generally travel in small groups, usually of two to six animals, but sometimes on rare occasions pods merge into groups of 200. They 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. The saddle patches of transients are solid and uniformly grey (in contrast to the residents saddle patches that often have more black-coloring). Transients roam widely along the coast; some individuals have been sighted in both southern Alaska and California. Transients are also referred to as 391: 19: 458: 293: 95: 248:. Offshores typically congregate in groups of 20–75, with occasional sightings of larger groups of up to 200. 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. They have been spotted in 591:
indicates the types B and C be recognized as distinct species, as should the North Pacific transients, leaving the others as subspecies pending additional data. Advanced methods that sequenced the entire mitochondrial genome revealed systematic differences in DNA between different populations. A 2019
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and declined from 22 individuals to eight between 1989 and 2004. The GOA/AI/BS stock may number around 500 whales while the west coast transients number over 320 orcas with over 200 along southeast Alaska, British Columbia and Washington and over 100 orcas off California. California transients do not
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orcas are the smallest ecotype and live 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 grey, with a dark grey dorsal cape and yellow-tinged patches. Its only observed prey is the
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orcas are smaller than type A. It has a large white eye patch. Most of the dark parts of its body are medium grey instead of black, although it has a dark grey patch called a "dorsal cape" stretching back from its forehead to just behind its dorsal fin. The white areas are stained slightly yellow.
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will be split into a number of different species or at least subspecies over the next few years." Although large variation in the ecological distinctiveness of different orca groups complicate simple differentiation into types. Mammal-eating orcas in different regions were long thought likely to be
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Remili, Anaïs; Dietz, Rune; Sonne, Christian; Samarra, Filipa I. P.; Rikardsen, Audun H.; Kettemer, Lisa E.; Ferguson, Steven H.; Watt, Cortney A.; Matthews, Cory J. D.; Kiszka, Jeremy J.; Jourdain, Eve; Borgå, Katrine; Ruus, Anders; Granquist, Sandra M.; Rosing‐Asvid, Aqqalu (June 2023).
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generally inhabits the inland waters of southern British Columbia and Washington, but can be found in the outer waters off Vancouver Island, Washington, Oregon and California. They consist of one clan and three pods, and number less than 80 individuals and are listed as
197:. The term has become increasingly common and may eventually replace the transient label. The transient ecotype is estimated to have diverged 700,000 years ago. There are at least three different "stocks" of transients off North America, the AT1 stock which occurs from 1819:
Remili, Anaïs; Dietz, Rune; Sonne, Christian; Samarra, Filipa I. P.; Letcher, Robert J.; Rikardsen, Audun H.; Ferguson, Steven H.; Watt, Cortney A.; Matthews, Cory J. D.; Kiszka, Jeremy J.; Rosing-Asvid, Aqqalu; McKinney, Melissa A. (2023-10-24).
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Pitman, Robert L.; Durban, John W.; Greenfelder, Michael; Guinet, Christophe; Jorgensen, Morton; Olson, Paula A.; Plana, Jordi; Tixier, Paul; Towers, Jared R. (August 7, 2010). "Observations of a distinctive morphotype of killer whale
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Orcas occur throughout the waters of Australia, New Zealand and Papua New Guinea. They are sighted year round in New Zealand waters, while off Australia, they are seasonally concentrated off the northwest, in the inshore waters of
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on the east coast of Argentina and hunt for sea lions and elephant seals on the shore, temporary stranding themselves. Off South Africa, a distinctive "flat-tooth" morphotype exists and preys on sharks. A pair of male orcas,
240:. However, because they have large, scarred and nicked dorsal fins resembling those of mammal-hunting transients, it may be that they also eat mammals and sharks. They have mostly been encountered off the west coast of 1100:
Barrett-Lennard LG, Ellis GM. 2001. Population structure and genetic variability in northeastern Pacific killer whales: Towards an assessment of population viability. Canadian Science Advisory Secretariat, Ottawa,
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tips that terminate in a sharp corner. The grey or white area around the dorsal fin, known as the "saddle patch", often contains some black colouring in residents. They visit the same areas consistently.
272:. Over 2,000 individual resident-like orcas and 130 transient-like orcas have been identified off Russia. At least 195 individual orcas have been cataloged in the eastern tropical Pacific, ranging from 2155:
Bolaños-Jiménez, Jaime; Mignucci-Giannoni, Antonio A.; Blumenth, Janice; et al. (2014). "Distribution, feeding habits and morphology of killer whales Orcinus orca in the Caribbean Sea".
454:, were described during the 1980s by Soviet researchers, but most cetacean researchers are skeptical about their status, and linking these directly to the types described below is difficult. 2366:
Reeves, Isabella M.; Totterdell, John A.; Barceló, Andrea; et al. (2022). "Population genomic structure of killer whales (Orcinus orca) in Australian and New Zealand waters".
1612: 350:, while some individuals seasonally travel to the waters of the eastern Canadian Arctic when the ice has melted. Sightings of these whales have been documented as far south as 668: 127:
resident populations are amongst the most intensively studied marine mammals anywhere in the world. Resident orcas can be divided into at least three distinct communities;
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Mitani, Yoko; Kita, Yuki F.; Saino, Shigeo; Yoshioka, Motoi; Ohizumi, Hiroshi; et al. (2021). "Mitochondrial DNA Haplotypes of Killer Whales around Hokkaido, Japan".
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Ford, J.K.B.; Ellis, G.M.; Barrett-Lennard, L.G.; Morton, A.B.; Palm, R.S.; Balcomb, K.C. (1998). "Dietary specialization in two sympatric populations of killer whales (
331:, orcas are considered "visitors", likely from the North Atlantic, and sightings become less frequent further east. However, a small year-round population exists in the 1222: 2004: 1074:
Baird, R.W.; Dill, L.M. (1995). "Occurrence and behaviour of transient killer whales: seasonal and pod-specific variability, foraging behaviour, and prey handling".
2927: 1188: 2620: 2590: 426:. Genetic evidence shows that the orcas of New Zealand, and northwest and southwest Australia form three distinct populations. New Zealand orcas mainly prey on 1548: 41:
and several distinct populations or types have been documented or suggested. Three to five types of orcas may be distinct enough to be considered different
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Best, P. B.; Meÿer, M. A.; Thornton, M.; et al. (2014). "Confirmation of the occurrence of a second killer whale morphotype in South African waters".
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Ford J.K.B. and, G.M. Ellis. 1999. Transients: Mammal-hunting killer whales of British Columbia, Washington, and Southeastern Alaska. UBC Press, Vancouver.
2567: 2211: 217:(GOA/AI/BS) stock and the west coast stock which ranges from southeast Alaska to California. AT1 is considered a depleted stock; it was affected by the 1357: 2785:
Morin, Phillip A; Archer, Frederick; Foote, Andrew D; Vilstrup, Julia; Allen, Eric E; Wade, Paul; Durban, John; Parsons, Kim; Pitman, Robert (2010).
2719: 2525:"A decade of photo-identification reveals contrasting abundance and trends of Type B killer whales in the coastal waters of the Antarctic Peninsula" 1822:"Varying Diet Composition Causes Striking Differences in Legacy and Emerging Contaminant Concentrations in Killer Whales across the North Atlantic" 506:
orcas are morphologically similar to Type B1, but smaller. This ecotype has been recorded feeding on penguins and seals, and is often found in the
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Towers, Jared R.; Pilkington, James F.; Gisborne, Brian; Wright, Brianna M.; Ellis, Graeme M.; Ford, John K. B.; Doniol-Valcroze, Thomas (2020).
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orcas look like a "typical" orca, a large, black-and-white form with a medium-sized white eye patch, living in open water and feeding mostly on
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Esteban, R.; Verborgh, P.; Gauffier, P.; et al. (2016). "Conservation Status of Killer Whales, Orcinus orca, in the Strait of Gibraltar".
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and number over 700 individuals. These whales consist of two interbreeding clans distinguished by acoustic calls and whose ranges overlap. The
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Deecke, V.B.; Ford, J.K.B.; Slater, P.J.B. (2005). "The vocal behaviour of mammal-eating killer whales: Communicating with costly calls".
1782:"Are "Type 2" killer whales long in the tooth? A critical reflection on the discrete categorization of Northeast Atlantic killer whales" 1571: 1862:"Quantitative fatty acid signature analysis reveals a high level of dietary specialization in killer whales across the North Atlantic" 304:
At least 15,000 whales are estimated to inhabit the North Atlantic. In the Northeast Atlantic, two orca ecotypes have been proposed.
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in the north to the northwest coast of South America in the south and west towards Hawaii. Orcas appear to regularly occur off the
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Jack W. Lawson & Tara S. Stevens (2014). "Historic and current distribution patterns, and minimum abundance of killer whales (
1335: 1484: 551:, Chile. It is recognizable by its small white eye patch, narrower and shorter than usual dorsal fin, bulbous head (similar to a 633: 2484: 374:
Over 50 individual whales have been cataloged in the northern Indian Ocean, including two individuals that were sighted in the
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Fearnbach, Holly; Durban, John W.; Ellifrit, David K.; Paredes, Alyssa; Hickmott, Leigh S.; Pitman, Robert L. (2022).
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in New Zealand and six at-sea sightings since 2004. The first video record of this type was made in 2014 between the
114:, and they live in complex and cohesive family groups called pods. Female residents characteristically have rounded 222:
appear to intermingle much with those further north and west coast transients may be divided into sub-communities.
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study of Type D orcas also found them to be distinct from other populations and possibly even a unique species.
555:), and smaller teeth. Its geographic range appears to be circumglobal in sub-Antarctic waters between latitudes 1395: 358:. This population is possibly continuous with orcas sighted off Greenland. Orcas are sighted year-round in the 2738:"Mitochondrial sequence divergence among Antarctic killer whale ecotypes is consistent with multiple species" 2563: 2215: 1522: 1373: 2970: 339:. Distinct populations may also exist off the west coast of tropical Africa, which have generalized diets. 2716: 1861: 2965: 1902: 1731:
Jourdain, Eve; Andvik, Clare; Karoliussen, Richard; Ruus, Anders; Vongraven, Dag; Borgå, Katrine (2020).
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O Matkin, Craig (2013). "Life history and population dynamics of southern Alaska resident killer whales (
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De Bruyn, P. J. N.; Tosh, C. A.; Terauds, A. (2013). "Killer whale ecotypes: Is there a global model?".
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sequences support the theory that these are recently diverged separate species. More recently, complete
1668:"Ecological, morphological and genetic divergence of sympatric North Atlantic killer whale populations" 1049: 1666:
Foote, Andrew D.; Newton, Jason; Piertney, Stuart B.; Willerslev, Eske; Gilbert, M. Thomas P. (2009).
106:: These are the most commonly sighted of the three populations in the coastal waters of the northeast 1974:"Killer whales of the Strait of Gibraltar, an endangered subpopulation showing a disruptive behavior" 1733:"Isotopic niche differs between seal and fish-eating killer whales (Orcinus orca) in northern Norway" 1010: 38: 563:. Although its diet is not determined, it likely includes fish, as determined by photographs around 390: 2154: 717: 2694: 1013:
Photo-identification Catalogue and Status of the Northern Resident Killer Whale Population in 2019
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Transients: Mammal-Hunting Killer Whales of British Columbia, Washington, and Southeastern Alaska
160: 148: 911: 237: 218: 284:. Orcas sighted in Hawaiian waters may belong to a greater population in the central Pacific. 2955: 2887: 2061:"Distributions of Arctic and Northwest Atlantic killer whales inferred from oxygen isotopes" 1972:
Esteban, Ruth; López, Alfredo; de los Rios, Álvaro Garcia; Ferreira, Marisa (October 2022).
903: 2072: 822: 568: 336: 198: 1730: 1012: 281: 8: 2850: 1667: 1572:"Killer whales in Hawaiian waters: information on population identity and feeding habits" 560: 556: 332: 265: 140: 2076: 1973: 1781: 1485:
Killer Whales of the Eastern Tropical Pacific: A Catalog of Photo-Identified Individuals
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and include herring-eating orcas of Norway and Iceland and mackerel-eating orcas of the
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Separate fish-eating and mammal-eating orca communities also exist off the coast of the
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Matthews, Cory J. D.; Longstafe, Fred J.; Lawson, Jack W.; Ferguson, Steven H. (2021).
2031: 1757: 1732: 1698: 1604: 1465: 1396:"'Elusive' creatures — known for hunting sharks — spotted in rare California encounter" 1311: 1149: 848: 791: 756: 660: 423: 277: 144: 124: 62: 2524: 228:: A third population of orcas in the northeast Pacific was discovered in 1988, when a 2893: 2872: 2820: 2767: 2548: 2387: 2365: 2098: 1954: 1944: 1883: 1841: 1801: 1762: 1690: 1686: 1469: 1447: 1331: 1310:
Dahlheim, M.E.; Schulman-Janiger, A.; Black, N.; Ternullo, R.; Balcomb, K.C. (2008).
1278: 915: 904: 840: 783: 769: 694: 584: 540: 411: 328: 269: 98:
Resident (fish-eating) orcas: The curved dorsal fins are typical of resident females.
88: 2675: 2503: 2141: 2035: 1608: 1153: 1050:
Southern Resident Killer Whales (Orcinus orca) 5-Year Review: Summary and Evaluation
664: 2810: 2802: 2757: 2749: 2663: 2536: 2453: 2422: 2375: 2320: 2293: 2279: 2271: 2164: 2129: 2088: 2080: 2023: 1985: 1936: 1873: 1833: 1821: 1793: 1752: 1744: 1682: 1594: 1586: 1457: 1327: 1141: 1083: 981: 884: 852: 830: 795: 773: 765: 712: 652: 564: 402: 395: 257: 241: 210: 152: 120: 2849:(Report). Committee on the Status of Endangered Wildlife in Canada. Archived from 2002: 1702: 1145: 2862: 2723: 2275: 536: 507: 493: 273: 71: 54: 2960: 2084: 1940: 588: 544: 457: 363: 229: 206: 183: 42: 27: 2667: 2133: 2027: 583:
in these waters may be responsible for the yellowish colouring of both types.
94: 2949: 2868: 1887: 1845: 1805: 703: 522: 419: 359: 107: 2426: 1878: 1837: 2824: 2771: 2753: 2440:
Visser, Ingrid N. (1999). "Benthic foraging on stingrays by killer whales (
2102: 1958: 1766: 1694: 1510: 844: 787: 656: 375: 347: 321: 292: 249: 236:. As their name suggests, they travel far from shore and feed primarily on 233: 202: 194: 2806: 2787:"Complete mitochondrial genome phylogeographic analysis of killer whales ( 1590: 552: 474: 355: 297: 245: 1461: 401:
A small population of orcas seasonally visits the northern point of the
1599: 335:, which numbered around 39 in 2011. From 2020, this population started 214: 165: 115: 46: 2717:
Newsletter of the Puget Sound Chapter of the American Cetacean Society
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Visser, Ingrid N. (2005). "First Observations of Feeding on Thresher (
2379: 2325: 2308: 2284: 2237: 2168: 1989: 1797: 1748: 985: 778: 1309: 1181:"Transient label is pushed aside to honour renowned whale researcher" 548: 443: 379: 313: 309: 1087: 888: 835: 810: 2345: 2261: 2214:. Whale and Dolphin Conservation. November 11, 2015. Archived from 1926: 489: 431: 351: 343: 261: 191: 23: 2736:
Pitman, Robert L.; Robertson, Kelly M.; Leduc, Richard G. (2008).
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Journal of the Marine Biological Association of the United Kingdom
2016:
Journal of the Marine Biological Association of the United Kingdom
1637: 692: 362:, and an estimated 267 (as of 2020) is documented in the northern 65:
of this genus is clearly in need of review, and it is likely that
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Weir, C. R.; Collins, T.; Carvalho, I.; Rosenbaum, H. C. (2010).
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Ford, John K. B.; Ellis, Graeme M.; Balcomb, Kenneth C. (2000).
2342:"Pair of Great White Shark-Eating Orca Return to Hunting Ground" 446:, and four types have been documented. Two dwarf species, named 1971: 151:
lives in coastal and inland waters from southeastern Alaska to
18: 2522: 1291: 1030: 992: 868: 2691:"The Antarctic Sun: News about Antarctica – Killer News" 2648: 2485:"Geographic Variation in the Color Pattern of Killer Whales ( 2115: 2009:) in Angolan and Gulf of Guinea waters, tropical West Africa" 1903:"Distribution of killer whales in the eastern north Atlantic" 1665: 1482: 949: 939: 937: 935: 933: 931: 427: 342:
The northwest Atlantic population is found year-round around
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in the 1970s and 1980s identified the following three types:
1316:): Occurrence, movements, and insights into feeding ecology" 631: 686: 535:
orcas were first identified based on photographs of a 1955
110:. Residents' diets consist primarily of fish and sometimes 58: 34: 2306: 1055:(Report). National Marine Fisheries Service. December 2021 928: 902:
Berta, Annalisa; Sumich, James L.; Kovacs, Kit M. (2006).
1900: 1490:(Report). National Oceanic and Atmospheric Administration 1312:"Eastern temperate North Pacific offshore killer whales ( 182:: The diets of these orcas consist almost exclusively of 2909:"Conservation Plan for Southern Resident Killer Whales ( 2784: 2518: 2516: 2307:
Engelbrecht, T. M.; Kock, A. A.; O'Riain, M. J. (2019).
1858: 1818: 139:. Southern Alaskan resident orcas are distributed from 749: 747: 745: 743: 741: 739: 737: 735: 2644: 2642: 2513: 2483:
Evans, W. E.; Yablokov, A. V.; Bowles, A. E. (1982).
2735: 2212:"A first ID match for the orcas of the Indian Ocean" 873:) in coastal British Columbia and adjacent waters". 320:
orcas consist of two haplotypes, and mainly feed on
264:, Japan. Russian orcas are commonly seen around the 2591:"Mysterious orcas filmed underwater for first time" 2482: 753: 732: 2639: 2464: 1160: 1104: 864: 862: 2439: 2400: 1215:"Cracking Orca's Code: It Comes in Several Types" 901: 602: 2947: 2926:(NMFS) Northwest Regional Office. Archived from 2885: 1297: 1131: 1036: 998: 955: 2496:Reports of the International Whaling Commission 967: 859: 693:Reeves, R.; Pitman, R.L.; Ford, J.K.B. (2017). 567:, where Type D orcas appeared to be preying on 718:10.2305/IUCN.UK.2017-3.RLTS.T15421A50368125.en 414:and other sharks off the South African coast. 287: 2892:(Second ed.). Vancouver, BC: UBC Press. 808: 442:Around 25,000 orcas are estimated around the 2621:"Sea Shepherd documents rare 'Type D' orcas" 2564:"First video footage of rare 'Type D' orcas" 2561: 2309:"Running scared: when predators become prey" 2054: 2052: 1569: 627: 625: 623: 621: 619: 617: 2726:, Spring 2004. Retrieved February 16, 2010. 2588: 2300: 645:Journal of Cetacean Research and Management 316:, as well as seal-eating orcas off Norway. 2860: 2623:. GrindTV. January 5, 2015. Archived from 1547:. Cascadia Research.org. August 16, 2016. 1208: 1206: 943: 337:ramming vessels and damaging their rudders 89:west coast of Canada and the United States 2814: 2761: 2394: 2339: 2324: 2283: 2092: 2049: 1877: 1756: 1661: 1659: 1657: 1655: 1598: 1563: 1273:Ford, J. K. B.; Ellis, Graeme M. (2009). 1272: 1172: 1073: 834: 777: 716: 614: 579:Types B and C live close to the ice, and 1483:Olson, Paula A; Gerrodette, Tim (2020). 1418: 1416: 1178: 456: 389: 291: 93: 17: 2693:. Antarcticsun.usap.gov. Archived from 1525:from the original on September 15, 2020 1203: 632:Pitman, Robert L.; Ensor, Paul (2003). 2948: 2654:), type D, from subantarctic waters". 2413:) Specialising on Elasmobranch Prey". 2340:Jenkinson, Orlando (17 January 2022). 2242:Patagonia Project Wildlife Expeditions 1826:Environmental Science & Technology 1652: 1511:"The orca in Galapagos: 135 sightings" 1508: 1424:"Far East Russia Orca Project (FEROP)" 1179:Bellaart, Darrell (December 4, 2012). 802: 2841: 2570:from the original on January 14, 2015 1779: 1618:from the original on October 23, 2017 1551:from the original on October 20, 2017 1413: 1338:from the original on October 13, 2010 1018:(Report). Fisheries and Oceans Canada 608: 547:, and again in 2017 off the coast of 496:and the mainland Antarctic peninsula. 410:, have become well known for hunting 394:Orca beaching to capture sea lion at 369: 159:and number over 300 orcas total. The 2906: 2589:Tennenhouse, Erica (March 1, 2018). 2470: 1996: 1901:Hammond, P. S.; Lockyer, C. (1988). 1350: 1212: 1166: 1110: 906:Marine mammals: evolutionary biology 492:. Type B1 orca are abundant between 461:Some examples of variations in orcas 704:IUCN Red List of Threatened Species 674:from the original on April 27, 2020 13: 2688: 2458:10.1111/j.1748-7692.1999.tb00793.x 1570:Baird, R. W.; et al. (2006). 1253:Alaska Department of Fish and Game 385: 77: 14: 2982: 2924:National Marine Fisheries Service 2844:Status of Killer Whales in Canada 2264:African Journal of Marine Science 2187:): Northern Gulf of Mexico Stock" 1780:Foote, Andrew D. (January 2023). 1712:from the original on July 9, 2011 1370:National Marine Fisheries Service 1368:. Office of Protected Resources, 1225:from the original on July 1, 2017 1213:WADE, NICHOLAS (April 26, 2010). 811:"Food chains: Killer in the kelp" 155:. It consists of three clans and 2562:Gough, Myles (January 9, 2015). 1687:10.1111/j.1365-294X.2009.04407.x 1332:10.1111/j.1748-7692.2008.00206.x 770:10.1111/j.1469-185X.2012.00239.x 82: 2778: 2729: 2709: 2682: 2613: 2582: 2555: 2476: 2433: 2359: 2333: 2255: 2230: 2204: 2175: 2148: 2120:) in the north-west Atlantic". 2109: 1965: 1920: 1894: 1852: 1812: 1773: 1724: 1630: 1537: 1502: 1476: 1441: 1388: 1303: 1266: 1237: 1125: 1116: 1094: 1067: 1042: 1004: 961: 634:"Three forms of killer whales ( 30:: The eye patch slants forward. 2842:Baird, Robin W. (April 1999). 1298:Ford, Ellis & Balcomb 2000 1037:Ford, Ellis & Balcomb 2000 999:Ford, Ellis & Balcomb 2000 956:Ford, Ellis & Balcomb 2000 895: 1: 2791:) indicates multiple species" 1146:10.1016/j.anbehav.2004.04.014 595: 74:has refuted this hypothesis. 2276:10.2989/1814232X.2014.923783 437: 422:, and the southwest, at the 232:researcher observed them in 7: 2409:) Sharks by Killer Whales ( 1076:Canadian Journal of Zoology 876:Canadian Journal of Zoology 288:North Atlantic and adjacent 161:southern resident community 149:northern resident community 10: 2987: 2835: 2444:) in New Zealand waters". 2085:10.1038/s41598-021-86272-5 1941:10.1016/bs.amb.2016.07.001 1929:Advances in Marine Biology 1545:"Killer whales in Hawai'i" 910:. Academic Press. p.  2861:Carwardine, Mark (2001). 2722:November 6, 2006, at the 2668:10.1007/s00300-010-0871-3 2502:: 687–694. Archived from 2134:10.1017/s0025315413001409 2028:10.1017/S002531541000072X 1866:Journal of Animal Ecology 1277:. UBC Press. p. 12. 39:cosmopolitan distribution 1509:Merlen, Godfrey (1999). 589:mitochondrial sequencing 573:Dissostichus eleginoides 37:or killer whales have a 2427:10.1578/AM.31.1.2005.83 1879:10.1111/1365-2656.13920 1838:10.1021/acs.est.3c05516 308:orcas consist of seven 61:reported in 2008, "The 2754:10.1098/rsbl.2008.0168 2045:on September 30, 2014. 809:Schrope, Mark (2007). 657:10.47536/jcrm.v5i2.813 638:) in Antarctic waters" 462: 398: 301: 296:Orca tail-slapping in 219:Exxon Valdez oil spill 99: 31: 2807:10.1101/gr.102954.109 2529:Marine Mammal Science 2446:Marine Mammal Science 2368:Marine Mammal Science 1978:Marine Mammal Science 1786:Marine Mammal Science 1737:Ecology and Evolution 1591:10.1353/psc.2006.0024 1515:Noticias de Galapagos 1320:Marine Mammal Science 974:Marine Mammal Science 711:: e.T15421A50368125. 460: 393: 295: 97: 70:closely related, but 21: 2856:on November 8, 2011. 569:Patagonian toothfish 199:Prince William Sound 22:Type C orcas in the 2971:Population genetics 2697:on October 15, 2011 2627:on January 11, 2015 2595:National Geographic 2218:on October 20, 2017 2077:2021NatSR..11.6739M 1832:(42): 16109–16120. 1462:10.3106/ms2020-0072 827:2007Natur.445..703S 488:It feeds mostly on 333:Strait of Gibraltar 266:Kamchatka Peninsula 141:southeastern Alaska 49:, or possibly even 2966:Population ecology 2405:) and Hammerhead ( 2065:Scientific Reports 1185:Nanaimo Daily News 757:Biological Reviews 463: 408:Port and Starboard 399: 370:North Indian Ocean 302: 278:Gulf of California 145:Kodiak Archipelago 100: 32: 2899:978-0-7748-0800-2 2878:978-0-7894-8266-2 2601:on March 31, 2019 2566:. Science Alert. 2541:10.1111/mms.12846 2509:on July 13, 2011. 2380:10.1111/mms.12851 2326:10.1002/ecs2.2531 2169:10.1111/mam.12021 1990:10.1111/mms.12947 1798:10.1111/mms.12964 1749:10.1002/ece3.6182 1675:Molecular Ecology 986:10.1111/mms.12049 946:, pp. 40–47. 921:978-0-12-088552-7 821:(7129): 703–705. 585:Mitochondrial DNA 452:Orcinus glacialis 329:Mediterranean Sea 282:Galápagos Islands 270:Commander Islands 87:Research off the 2978: 2942: 2940: 2938: 2933:on June 26, 2008 2932: 2917: 2903: 2882: 2857: 2855: 2848: 2829: 2828: 2818: 2782: 2776: 2775: 2765: 2733: 2727: 2713: 2707: 2706: 2704: 2702: 2686: 2680: 2679: 2646: 2637: 2636: 2634: 2632: 2617: 2611: 2610: 2608: 2606: 2597:. Archived from 2586: 2580: 2579: 2577: 2575: 2559: 2553: 2552: 2520: 2511: 2510: 2508: 2493: 2480: 2474: 2468: 2462: 2461: 2437: 2431: 2430: 2403:Alopias vulpinus 2398: 2392: 2391: 2363: 2357: 2356: 2354: 2352: 2337: 2331: 2330: 2328: 2304: 2298: 2297: 2287: 2259: 2253: 2252: 2250: 2248: 2234: 2228: 2227: 2225: 2223: 2208: 2202: 2201: 2199: 2197: 2191: 2179: 2173: 2172: 2163:(3–4): 177–189. 2152: 2146: 2145: 2128:(6): 1253–1265. 2113: 2107: 2106: 2096: 2056: 2047: 2046: 2044: 2038:. Archived from 2022:(8): 1601–1611. 2013: 2005:"Killer whales ( 2000: 1994: 1993: 1984:(4): 1699–1709. 1969: 1963: 1962: 1924: 1918: 1917: 1910:Rit Fiskideildar 1907: 1898: 1892: 1891: 1881: 1872:(6): 1216–1229. 1856: 1850: 1849: 1816: 1810: 1809: 1777: 1771: 1770: 1760: 1743:(9): 4115–4127. 1728: 1722: 1721: 1719: 1717: 1711: 1672: 1663: 1650: 1649: 1647: 1645: 1634: 1628: 1627: 1625: 1623: 1617: 1602: 1576: 1567: 1561: 1560: 1558: 1556: 1541: 1535: 1534: 1532: 1530: 1506: 1500: 1499: 1497: 1495: 1489: 1480: 1474: 1473: 1445: 1439: 1438: 1436: 1434: 1420: 1411: 1410: 1408: 1407: 1392: 1386: 1385: 1383: 1381: 1372:. Archived from 1354: 1348: 1347: 1345: 1343: 1307: 1301: 1295: 1289: 1288: 1270: 1264: 1263: 1261: 1259: 1245:"Killer Whales ( 1241: 1235: 1234: 1232: 1230: 1210: 1201: 1200: 1198: 1196: 1191:on March 1, 2014 1187:. Archived from 1176: 1170: 1164: 1158: 1157: 1134:Animal Behaviour 1129: 1123: 1120: 1114: 1108: 1102: 1098: 1092: 1091: 1082:(7): 1300–1311. 1071: 1065: 1064: 1062: 1060: 1054: 1046: 1040: 1034: 1028: 1027: 1025: 1023: 1017: 1008: 1002: 996: 990: 989: 965: 959: 953: 947: 941: 926: 925: 909: 899: 893: 892: 883:(8): 1456–1471. 866: 857: 856: 838: 806: 800: 799: 781: 751: 730: 729: 727: 725: 720: 690: 684: 683: 681: 679: 673: 642: 629: 612: 606: 565:longline vessels 403:Valdes Peninsula 396:Valdes Peninsula 378:in 2008 and off 258:Russian Far East 242:Vancouver Island 211:Aleutian Islands 153:Vancouver Island 137:southern Alaskan 121:British Columbia 2986: 2985: 2981: 2980: 2979: 2977: 2976: 2975: 2946: 2945: 2936: 2934: 2930: 2915: 2900: 2879: 2853: 2846: 2838: 2833: 2832: 2795:Genome Research 2783: 2779: 2742:Biology Letters 2734: 2730: 2724:Wayback Machine 2714: 2710: 2700: 2698: 2689:Rejcek, Peter. 2687: 2683: 2647: 2640: 2630: 2628: 2619: 2618: 2614: 2604: 2602: 2587: 2583: 2573: 2571: 2560: 2556: 2521: 2514: 2506: 2491: 2481: 2477: 2469: 2465: 2438: 2434: 2415:Aquatic Mammals 2407:Sphyrna zygaena 2399: 2395: 2364: 2360: 2350: 2348: 2338: 2334: 2305: 2301: 2260: 2256: 2246: 2244: 2236: 2235: 2231: 2221: 2219: 2210: 2209: 2205: 2195: 2193: 2189: 2183:"Killer Whale ( 2181: 2180: 2176: 2153: 2149: 2114: 2110: 2057: 2050: 2042: 2011: 2001: 1997: 1970: 1966: 1951: 1925: 1921: 1905: 1899: 1895: 1857: 1853: 1817: 1813: 1778: 1774: 1729: 1725: 1715: 1713: 1709: 1681:(24): 5207–17. 1670: 1664: 1653: 1643: 1641: 1636: 1635: 1631: 1621: 1619: 1615: 1579:Pacific Science 1574: 1568: 1564: 1554: 1552: 1543: 1542: 1538: 1528: 1526: 1507: 1503: 1493: 1491: 1487: 1481: 1477: 1446: 1442: 1432: 1430: 1422: 1421: 1414: 1405: 1403: 1394: 1393: 1389: 1379: 1377: 1376:on July 9, 2017 1358:"Killer whale ( 1356: 1355: 1351: 1341: 1339: 1308: 1304: 1296: 1292: 1285: 1271: 1267: 1257: 1255: 1243: 1242: 1238: 1228: 1226: 1211: 1204: 1194: 1192: 1177: 1173: 1165: 1161: 1130: 1126: 1121: 1117: 1109: 1105: 1099: 1095: 1088:10.1139/z95-154 1072: 1068: 1058: 1056: 1052: 1048: 1047: 1043: 1035: 1031: 1021: 1019: 1015: 1009: 1005: 997: 993: 966: 962: 954: 950: 944:Carwardine 2001 942: 929: 922: 900: 896: 889:10.1139/z98-089 867: 860: 836:10.1038/445703a 807: 803: 752: 733: 723: 721: 691: 687: 677: 675: 671: 640: 630: 615: 607: 603: 598: 508:Gerlache Strait 494:Adelaide Island 440: 388: 386:Southern waters 372: 290: 274:Baja California 85: 80: 78:Northern waters 72:genetic testing 55:Species problem 12: 11: 5: 2984: 2974: 2973: 2968: 2963: 2958: 2944: 2943: 2904: 2898: 2883: 2877: 2858: 2837: 2834: 2831: 2830: 2801:(7): 908–916. 2777: 2728: 2708: 2681: 2662:(2): 303–306. 2638: 2612: 2581: 2554: 2512: 2475: 2463: 2452:(1): 220–227. 2432: 2393: 2374:(1): 151–174. 2358: 2332: 2299: 2270:(2): 215–224. 2254: 2229: 2203: 2174: 2147: 2108: 2048: 1995: 1964: 1949: 1919: 1893: 1851: 1811: 1792:(1): 345–350. 1772: 1723: 1651: 1638:"Killer Whale" 1629: 1585:(4): 523–530. 1562: 1536: 1501: 1475: 1456:(3): 205–211. 1440: 1412: 1387: 1366:NOAA Fisheries 1349: 1326:(3): 719–729. 1302: 1290: 1284:978-0774807173 1283: 1265: 1236: 1219:New York Times 1202: 1171: 1159: 1140:(2): 395–405. 1124: 1115: 1103: 1093: 1066: 1041: 1029: 1003: 991: 980:(2): 460–479. 960: 948: 927: 920: 894: 858: 801: 731: 685: 651:(2): 131–139. 613: 600: 599: 597: 594: 577: 576: 545:Crozet Islands 537:mass stranding 526: 511: 497: 478: 439: 436: 387: 384: 371: 368: 364:Gulf of Mexico 289: 286: 254: 253: 252:in California. 238:schooling fish 230:humpback whale 223: 207:Gulf of Alaska 184:marine mammals 170: 169: 84: 81: 79: 76: 28:Southern Ocean 9: 6: 4: 3: 2: 2983: 2972: 2969: 2967: 2964: 2962: 2959: 2957: 2954: 2953: 2951: 2929: 2925: 2921: 2914: 2912: 2907:NMFS (2005). 2905: 2901: 2895: 2891: 2890: 2889:Killer Whales 2884: 2880: 2874: 2870: 2869:BBC Worldwide 2866: 2865: 2864:Killer Whales 2859: 2852: 2845: 2840: 2839: 2826: 2822: 2817: 2812: 2808: 2804: 2800: 2796: 2792: 2790: 2781: 2773: 2769: 2764: 2759: 2755: 2751: 2747: 2743: 2739: 2732: 2725: 2721: 2718: 2715:Gorter, Uko. 2712: 2696: 2692: 2685: 2677: 2673: 2669: 2665: 2661: 2657: 2656:Polar Biology 2653: 2645: 2643: 2626: 2622: 2616: 2600: 2596: 2592: 2585: 2569: 2565: 2558: 2550: 2546: 2542: 2538: 2534: 2530: 2526: 2519: 2517: 2505: 2501: 2497: 2490: 2488: 2479: 2473:, p. 46. 2472: 2467: 2459: 2455: 2451: 2447: 2443: 2436: 2428: 2424: 2420: 2416: 2412: 2408: 2404: 2397: 2389: 2385: 2381: 2377: 2373: 2369: 2362: 2347: 2343: 2336: 2327: 2322: 2319:(1): e02531. 2318: 2314: 2310: 2303: 2295: 2291: 2286: 2281: 2277: 2273: 2269: 2265: 2258: 2243: 2239: 2233: 2217: 2213: 2207: 2188: 2186: 2178: 2170: 2166: 2162: 2158: 2157:Mammal Review 2151: 2143: 2139: 2135: 2131: 2127: 2123: 2119: 2112: 2104: 2100: 2095: 2090: 2086: 2082: 2078: 2074: 2070: 2066: 2062: 2055: 2053: 2041: 2037: 2033: 2029: 2025: 2021: 2017: 2010: 2008: 1999: 1991: 1987: 1983: 1979: 1975: 1968: 1960: 1956: 1952: 1950:9780128051528 1946: 1942: 1938: 1934: 1930: 1923: 1915: 1911: 1904: 1897: 1889: 1885: 1880: 1875: 1871: 1867: 1863: 1855: 1847: 1843: 1839: 1835: 1831: 1827: 1823: 1815: 1807: 1803: 1799: 1795: 1791: 1787: 1783: 1776: 1768: 1764: 1759: 1754: 1750: 1746: 1742: 1738: 1734: 1727: 1708: 1704: 1700: 1696: 1692: 1688: 1684: 1680: 1676: 1669: 1662: 1660: 1658: 1656: 1639: 1633: 1614: 1610: 1606: 1601: 1596: 1592: 1588: 1584: 1580: 1573: 1566: 1550: 1546: 1540: 1524: 1520: 1516: 1512: 1505: 1486: 1479: 1471: 1467: 1463: 1459: 1455: 1451: 1444: 1429: 1428:us.whales.org 1425: 1419: 1417: 1401: 1397: 1391: 1375: 1371: 1367: 1363: 1361: 1353: 1337: 1333: 1329: 1325: 1321: 1317: 1315: 1306: 1300:, p. 21. 1299: 1294: 1286: 1280: 1276: 1269: 1254: 1250: 1248: 1240: 1224: 1220: 1216: 1209: 1207: 1190: 1186: 1182: 1175: 1169:, p. 24. 1168: 1163: 1155: 1151: 1147: 1143: 1139: 1135: 1128: 1119: 1113:, p. 23. 1112: 1107: 1097: 1089: 1085: 1081: 1077: 1070: 1051: 1045: 1039:, p. 47. 1038: 1033: 1014: 1007: 1001:, p. 45. 1000: 995: 987: 983: 979: 975: 971: 964: 958:, p. 23. 957: 952: 945: 940: 938: 936: 934: 932: 923: 917: 913: 908: 907: 898: 890: 886: 882: 878: 877: 872: 865: 863: 854: 850: 846: 842: 837: 832: 828: 824: 820: 816: 812: 805: 797: 793: 789: 785: 780: 775: 771: 767: 763: 759: 758: 750: 748: 746: 744: 742: 740: 738: 736: 719: 714: 710: 706: 705: 700: 698: 689: 670: 666: 662: 658: 654: 650: 646: 639: 637: 628: 626: 624: 622: 620: 618: 610: 605: 601: 593: 590: 586: 582: 574: 570: 566: 562: 558: 554: 550: 546: 542: 538: 534: 533:Sub-Antarctic 530: 527: 524: 523:Antarctic cod 519: 515: 512: 509: 505: 501: 498: 495: 491: 486: 482: 479: 476: 472: 468: 465: 464: 459: 455: 453: 449: 448:Orcinus nanus 445: 435: 433: 429: 425: 424:Bremer region 421: 420:Ningaloo Reef 415: 413: 409: 404: 397: 392: 383: 381: 377: 367: 365: 361: 360:Caribbean Sea 357: 353: 349: 345: 340: 338: 334: 330: 325: 323: 322:baleen whales 319: 315: 311: 307: 299: 294: 285: 283: 279: 275: 271: 267: 263: 259: 251: 247: 243: 239: 235: 231: 227: 224: 220: 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Retrieved 2928:the original 2911:Orcinus orca 2910: 2888: 2863: 2851:the original 2798: 2794: 2789:Orcinus orca 2788: 2780: 2748:(4): 426–9. 2745: 2741: 2731: 2711: 2701:February 16, 2699:. Retrieved 2695:the original 2684: 2659: 2655: 2652:Orcinus orca 2651: 2629:. Retrieved 2625:the original 2615: 2603:. Retrieved 2599:the original 2594: 2584: 2572:. Retrieved 2557: 2535:(1): 58–72. 2532: 2528: 2504:the original 2499: 2495: 2487:Orcinus orca 2486: 2478: 2466: 2449: 2445: 2442:Orcinus orca 2441: 2435: 2421:(1): 83–88. 2418: 2414: 2411:Orcinus orca 2410: 2406: 2402: 2396: 2371: 2367: 2361: 2349:. Retrieved 2335: 2316: 2312: 2302: 2267: 2263: 2257: 2245:. Retrieved 2241: 2232: 2220:. Retrieved 2216:the original 2206: 2194:. Retrieved 2185:Orcinus orca 2184: 2177: 2160: 2156: 2150: 2125: 2121: 2118:Orcinus orca 2117: 2111: 2068: 2064: 2040:the original 2019: 2015: 2007:Orcinus orca 2006: 1998: 1981: 1977: 1967: 1932: 1928: 1922: 1913: 1909: 1896: 1869: 1865: 1854: 1829: 1825: 1814: 1789: 1785: 1775: 1740: 1736: 1726: 1716:February 27, 1714:. Retrieved 1678: 1674: 1642:. Retrieved 1632: 1620:. Retrieved 1582: 1578: 1565: 1553:. Retrieved 1539: 1527:. Retrieved 1518: 1514: 1504: 1492:. Retrieved 1478: 1453: 1450:Mammal Study 1449: 1443: 1431:. Retrieved 1427: 1404:. Retrieved 1402:. 2023-08-04 1399: 1390: 1378:. Retrieved 1374:the original 1365: 1360:Orcinus orca 1359: 1352: 1340:. Retrieved 1323: 1319: 1314:Orcinus orca 1313: 1305: 1293: 1274: 1268: 1256:. Retrieved 1252: 1247:Orcinus orca 1246: 1239: 1229:February 17, 1227:. Retrieved 1218: 1193:. Retrieved 1189:the original 1184: 1174: 1162: 1137: 1133: 1127: 1118: 1106: 1096: 1079: 1075: 1069: 1057:. Retrieved 1044: 1032: 1020:. Retrieved 1006: 994: 977: 973: 970:Orcinus orca 969: 963: 951: 905: 897: 880: 874: 871:Orcinus orca 870: 818: 814: 804: 764:(1): 62–80. 761: 755: 722:. Retrieved 708: 702: 697:Orcinus orca 696: 688: 676:. Retrieved 648: 644: 636:Orcinus orca 635: 611:, p. 1. 604: 578: 572: 532: 528: 517: 513: 503: 499: 484: 480: 475:minke whales 470: 466: 451: 447: 441: 416: 412:great whites 400: 376:Persian Gulf 373: 348:Newfoundland 341: 326: 317: 305: 303: 255: 250:Monterey Bay 225: 203:Kenai Fjords 195:Michael Bigg 187: 179: 175: 171: 136: 132: 128: 103: 86: 66: 33: 15: 2574:January 11, 2222:October 19, 2196:January 30, 2071:(1): 6739. 1935:: 141–172. 1622:October 23, 1600:10125/22585 1555:October 19, 1342:February 5, 1195:December 4, 724:19 November 553:pilot whale 356:Long Island 298:Vestfjorden 246:Haida Gwaii 188:Bigg's orca 2950:Categories 2937:January 2, 2867:. London: 2631:January 6, 2285:2263/42023 1406:2023-08-05 1400:Yahoo News 1380:August 15, 779:2263/21531 678:January 9, 609:Baird 1999 596:References 310:haplotypes 234:open water 215:Bering Sea 192:cetologist 166:endangered 125:Washington 116:dorsal fin 47:subspecies 2605:April 12, 2549:237808561 2471:NMFS 2005 2388:237736039 2313:Ecosphere 1888:0021-8790 1846:0013-936X 1806:0824-0469 1529:March 14, 1470:236221150 1167:NMFS 2005 1111:NMFS 2005 549:Cape Horn 541:Kerguelen 471:Antarctic 444:Antarctic 438:Antarctic 382:in 2015. 380:Sri Lanka 314:North Sea 244:and near 176:Transient 2922:, U.S.: 2825:20413674 2772:18524738 2720:Archived 2676:20734772 2568:Archived 2346:Newsweek 2142:84750726 2103:33762671 2036:84721171 1959:27770983 1916:: 24–41. 1767:32489635 1707:Archived 1695:20050301 1640:. NAMMCO 1613:Archived 1609:16788148 1549:Archived 1523:Archived 1336:Archived 1223:Archived 1154:16899659 845:17301765 788:22882545 669:Archived 665:52257732 518:Ross Sea 504:Gerlache 485:pack ice 352:Cape Cod 344:Labrador 300:, Norway 276:and the 262:Hokkaido 226:Offshore 133:southern 129:northern 104:Resident 63:taxonomy 24:Ross Sea 2920:Seattle 2836:Sources 2816:2892092 2763:2610147 2351:2 March 2294:3947611 2238:"Orcas" 2094:7990931 2073:Bibcode 1758:7244801 1521:: 2–8. 1101:Canada. 853:4421362 823:Bibcode 796:6336624 581:diatoms 500:Type B2 481:Type B1 327:In the 157:16 pods 143:to the 108:Pacific 67:O. orca 57:). The 51:species 26:in the 2896:  2875:  2823:  2813:  2770:  2760:  2674:  2547:  2386:  2292:  2247:11 May 2192:. 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Index

Orca mother and calf extending their bodies above the water surface, from pectoral fins forward, with ice pack in background
Ross Sea
Southern Ocean
Orcas
cosmopolitan distribution
races
subspecies
species
Species problem
IUCN
taxonomy
genetic testing
west coast of Canada and the United States

Pacific
squid
dorsal fin
British Columbia
Washington
southeastern Alaska
Kodiak Archipelago
northern resident community
Vancouver Island
16 pods
southern resident community
endangered
marine mammals
cetologist
Michael Bigg
Prince William Sound

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