A study comparing the nutritional demands of killer whales with the caloric content of their prey has startling implications for the potential impact of these large predators on populations of other ...

New research has confirmed that West Coast transient killer whales who live between British Columbia and California are two distinct subpopulations: inner and outer coast transients. Based on 16 years ...

New research confirms two distinct groups of West Coast killer whales with different diets, habitats, and behaviors.

A study reveals that certain West Coast orcas belong to distinct social groups with different habits and diets. NPR's Scott Simon speaks with ecologist Josh McInnes about how the groups differ.

Draft legislation aims to amend the Marine Mammal Protection Act, potentially easing restrictions on species protection.

Killer whales have been seen detaching lengths of seaweed and using them to massage each other—the first evidence of tool-making by marine mammals. The whales bite off the end of a kelp stalk, ...

As The Wire reported earlier this week, in addition to annexing Crimea, Russia stole Ukraine’s killer dolphin army. The dolphin army (or navy, depending on your point of view) will be joining forces ...

New research has confirmed that West Coast transient killer whales who live between British Columbia and California are two ...