A new study provides the first DNA evidence that killer whales in Australia hunt white sharks for their nutrient-rich livers.

Recent findings used wildlife forensics and citizen science data to provide the first confirmed evidence of killer whale ...

Based on DNA analysis from the bite wounds on the carcass of a large white shark washed ashore near Portland in Victoria in ...

Orcinus is derived from the Latin word orcus, which means “of the netherworld.” Originally known as “whale killer,” the orca's common name stems from early whalers' records of the species' predatory ...

Scientists have resolved one of the outstanding questions about one of the world's most recognizable creatures, identifying two well-known killer whales in the North Pacific Ocean as separate species.

At the time, researchers believed they knew what had managed to kill this shark, but they could not confirm it. Now, however, ...

the scientists compared two groups of orcas (Orcinus orca) — resident and Bigg's killer whales — and cited a number of distinct differences. For example, resident killer whales have more ...

For most of the 20th century, scientists on the Pacific Coast of North America held two basic assumptions about the killer whale (Orcinus orca): first, it was a voracious predator inclined to attack ...

This story appears in the July 2015 issue of National Geographic magazine. There are no orcas to speak of in Western literature. Although they look like mythic creatures, with their sleek bodies ...