(Reuters) -Killer whales are known for exceptional intelligence, displaying complex social structures and sophisticated communication. New research provides fresh evidence for this, documenting ...

The whales in question are the southern resident killer whales that live in the Salish Sea between Vancouver Island and Seattle.

Killer whales off the west coast of North America have been spotted making and using tools to groom each other, the first time such behaviour has been recorded in marine mammals.

Killer whales have been caught on video breaking off pieces of seaweed to rub and groom each other, scientists announced on Monday, in what they said is the first evidence of marine mammals making ...

Researchers have observed a population of orcas that cut and position kelp tools between their bodies to scrub each other’s backs.

Killer whales were seen ‘kissing’ for the first time in the wild, photo evidence shows. The ‘rare’ encounter ‘lasted nearly two minutes,’ researchers said.

Killer whales have been caught on video breaking off pieces of seaweed to rub and groom each other, scientists announced Monday, in what they said is the first evidence of marine mammals making ...

Southern resident killer whales are using kelp for what scientists suspect are both hygienic and social purposes.

There’s a longstanding cetacean fad called “kelping,” in which orcas and other whales drape leafy kelp fronds on their fins and forehead. And killer whale youngsters are fond of playing kelp ...

Killer whales have been caught on video breaking off pieces of seaweed to rub and groom each other, scientists announced Monday, in what they said is the first evidence of marine mammals making ...

Killer whales appear to be inviting humans for lunch, a new study suggests. The research investigated unusual occurrences of orcas in four oceans attempting to share prey with people. More than 30 ...