Researchers using a new drone say they have observed killer whales finding and modifying stalks of kelp to preen each other.

Behavioral ecologist Michael Weiss was browsing through new drone footage of the orca pods he studies in the Salish Sea when he spotted one of the killer whales carrying something green in its mouth ...

Drone footage reveals orcas making tools from kelp to groom each other - Scientists observed the surprising social behaviour, ...

The more we learn about orcas, the more remarkable they are. These giant dolphins are the ocean's true apex predator, preying ...