The data distinguish two of the killer whale ecotypes of the North Pacific Coast—residents and Bigg's—as separate species. "We started to ask this question 20 years ago, but we didn't have ...

However, there are likely to be other ecotypes in Falkland waters. The “type D” killer whale has just a tiny white eye patch; it is known from a few sightings in Sub-Antarctic waters ...

Three ecotypes of orca are already known to live ... The name “transient” was coined by killer whale researcher Dr. Michael Bigg who observed their behaviour as transient or more nomadic.

On a cold January day I was surrounded by hundreds of black-and-white killer whales—Orcinus orca, not a whale but rather ... orcas are divided into three ecotypes based on their diet, which ...

New research finds some baleen whale species call at such deep frequencies that they're completely undetectable by killer whales, which cannot hear sounds below 100 hertz. These also tend to be the ...