Killer whale moms spend a lot of energy and resources on their adult sons. Research shows that could impact their reproductive success long-term. It takes a lot of effort to raise a kid ...

Killer whale moms are still supporting their adult sons — and it's costing them. ... an adult female killer whale (dubbed K16 by those who know her well) gave birth to a son, K35.

Orcas often share food with each other—it’s a prosocial activity and a way that they build relationships with each other,” ...

Like a proud cat leaving a bird on its owner's doorstep, orcas—also called killer whales—may sometimes offer to share their ...

Whale watchers on a boat off the coast of California captured the incredible moment an adult killer whale taught its offspring how to hunt by flinging common murres into the air on September 7.

CWR said two adult males, K34 and L85, and the only whale born within the census period, male calf J60, died. More details : Census reveals decline in Southern Resident killer whale population ...

A killer whale was spotted balancing a salmon on its head. It’s not clear what the behavior means, but orcas were observed doing the same thing in the 1980s.

Killer whales are known for their intelligence and power, even an inclination to sink yachts. Now, research is showing how they take down prey that few other animals can. Orcas in Mexico's Gulf of ...

One killer whale was caught this season by trawlers targeting flatfish in the Bering Sea, down from nine last year. The trawlers had deployed underwater web fences to try to keep killer whales ...

Twenty years ago, in the waters off the coast of Washington State and British Columbia, an adult female killer whale (dubbed K16 by those who know her well) gave birth to a son, K35. "These two have ...

Twenty years ago, in the waters off the coast of Washington State and British Columbia, an adult female killer whale (dubbed K16 by those who know her well) gave birth to a son, K35. "These two ...