Acoustics

Killer whales are active both day and night, but most scientific research focuses on their daytime activities. A recent study looked at a small group of endangered southern residents to find out how often they hunt after the sun goes down. Ocean noise tends to decrease at night, potentially making it easier for the whales to catch salmon, but could they take advantage?

Audio recordings of rhinoceros auklets on Protection Island.

The Salish Sea may be a giant ‘practice room’ for humpback whales as they get ready to sing in their winter breeding grounds in Hawaii and Mexico. A network of hydrophones is recording it all.