Patrick Pester is a freelance writer and previously a staff writer at Live Science. His background is in wildlife conservation and he has worked with endangered species around the world. Patrick holds a master's degree in international journalism from Cardiff University in the U.K.
A mysterious population of orcas said to have hunted alongside Indigenous Australian whalers for millennia and European whalers for decades appears to be extinct, genetic analysis has revealed.
To learn more about these orcas, researchers analyzed the DNA of a 23-foot-long orca from this group called"Old Tom." His DNA proved different enough to living orcas to suggest that the whale-hunting population he belonged to is now extinct. Old Tom likely shared a common ancestor with New Zealand orcas. However, much of the variation in Old Tom's genome isn't present in the recorded DNA of any living population, meaning it was likely lost through extinction, the researchers found.
RELATED STORIES—Orcas are harassing and playing with baby porpoises in deadly game that has lasted 60 years—Opportunistic orcas have developed a new feeding behavior that appears to be killing them
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