SEATTLE — Federal biologists have temporarily stopped tagging endangered orcas in the Puget Sound after a dead orca was found with pieces of a dart tag lodged in its dorsal fin. Researchers use a dart ...

Northwest Pacific orcas have started wearing salmon hats again, bringing back a bizarre trend first described in the 1980s, researchers say. This is the first time they've donned the bizarre headgear ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world. Orcas, commonly known as killer whales, are known for their ...