Southern resident orcas use echolocation to hunt prey ... amount of prey is there more available to the whales,” WDFW killer whale policy lead Dr. Julie Watson said. “They’re more likely ...

The southern resident killer whales are threatened by depleted prey populations (mainly Chinook salmon), physical disturbances that interfere with echolocation, pollution and climate change ...

orca is actually made up of more than one species ... Residents hunt in large groups using echolocation, and transients hunt silently in small groups. Transients have calls that have different ...

Dolphins use a language of clicks and whistles, called echolocation, to track down their prey and create a mental map of their surroundings. Some dolphin species live in freshwater rivers, like the ...