Killer whales near Washington, for instance, started wearing dead salmon on their heads as "hats." No one knows why. Orcas hunt in packs and can take down blue whales and great white sharks.

In the U.S., "Expedition Killer Whale" premieres on Wednesday, Feb. 12 on PBS at 8pm ET / 7pm CT / 5pm PT. You can watch PBS on television via most cable TV packages — check your local listings ...

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 ...

While well-documented in the Northern Hemisphere and Antarctica, much less is known about killer whales (Orcinus orca) in ...

A young female orca calf recently spotted by the CWR has now been confirmed to be the offspring of a whale who carried her dead calf for 17 days in 2018.

In 1992, a colleague had returned from a fishing trip in Baja with a story about seeing two killer whales attacking a whale shark. But Ms. Schulman-Janiger was never able to confirm the event.