Are Killer Whales Splitting Into Distinct Species?

By Dr. Becker
Orcas, or killer whales, are a fascinating group of whales and dolphins that span the waters of the globe. Many are separated geologically, so while they are distantly related, each group has its own appearances, behaviors, sounds and even genetics. Different types of orcas are known as “ecotypes,” at least 10 of which have been described.1 In the Pacific, there are three primary orca ecotypes that have maintained their differences even though, in this case, they are not divided …

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