Emma Luck on Twitter: "The number of ecotypes vs species vs subspecies still needs to be worked out. There are 10 ecotypes that have been known for some time, represented on this
![Cold call: the acoustic repertoire of Ross Sea killer whales (Orcinus orca, Type C) in McMurdo Sound, Antarctica | Royal Society Open Science Cold call: the acoustic repertoire of Ross Sea killer whales (Orcinus orca, Type C) in McMurdo Sound, Antarctica | Royal Society Open Science](https://royalsocietypublishing.org/cms/asset/98da1d8c-009d-45e4-ada0-f0dca9bd130d/rsos191228f04.jpg)
Cold call: the acoustic repertoire of Ross Sea killer whales (Orcinus orca, Type C) in McMurdo Sound, Antarctica | Royal Society Open Science
![Genome-culture coevolution promotes rapid divergence of killer whale ecotypes | Nature Communications Genome-culture coevolution promotes rapid divergence of killer whale ecotypes | Nature Communications](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fncomms11693/MediaObjects/41467_2016_Article_BFncomms11693_Fig1_HTML.jpg)
Genome-culture coevolution promotes rapid divergence of killer whale ecotypes | Nature Communications
Killer Whale (Orcinus orca) Predation on Beaked Whales (Mesoplodon spp.) in the Bremer Sub-Basin, Western Australia | PLOS ONE
![Morphological and ecological evidence for two sympatric forms of Type B killer whale around the Antarctic Peninsula | SpringerLink Morphological and ecological evidence for two sympatric forms of Type B killer whale around the Antarctic Peninsula | SpringerLink](https://media.springernature.com/lw685/springer-static/image/art%3A10.1007%2Fs00300-016-1942-x/MediaObjects/300_2016_1942_Fig2_HTML.jpg)
Morphological and ecological evidence for two sympatric forms of Type B killer whale around the Antarctic Peninsula | SpringerLink
![Jen Richards on Twitter: "One of my favourite things about killer whales is how diverse they are in behaviour, diet, and appearance, so I drew four of them together as a comparison. Jen Richards on Twitter: "One of my favourite things about killer whales is how diverse they are in behaviour, diet, and appearance, so I drew four of them together as a comparison.](https://pbs.twimg.com/media/Dxc5YZtXQAEUa_j.png)