Researchers use 'environmental DNA' to identify killer whales - Science & research news | Frontiers
How to Get a Killer Whale to Say 'Hello' - The New York Times
Facts About Killer Whales | Nature and Wildlife | Discovery
Whale-watchers stunned after 'rare' sighting of killer whales off Port Macquarie - ABC News
Orcas recorded killing and feeding on blue whales in brutal attacks | Whales | The Guardian
Killer Whale Animal Facts | Orcinus orca - AZ Animals
Dead bowheads in Beaufort and Chukchi point to increased killer whale presence in Arctic - Alaska Public Media
Killer whales spotted for the first time killing blue whales | Live Science
Orca - Wikipedia
First orca whale to beach in southeast U.S. in decades showed signs of illness : NPR
Killer Whale | NOAA Fisheries
Orcas (Killer Whales): Facts and Information
Orcas (Killer Whales): Facts and Information
Facts about orcas (killer whales) - Whale & Dolphin Conservation USA
10 top questions about Orca - Wild 4 Whales Foundation
Orca - National Maritime Historical Society
12 Killer Whale Facts | Next Level Sailing
Nearly 30 Bigg's Killer Whales Spotted Locally Over Labor Day Weekend — Pacific Whale Watch Association
Orca mothers make 'lifelong sacrifice' for sons - BBC News
Orcas” or “Killer Whales”? – Orca Guardians Iceland
Orcas (Orcinus orca) | New Scientist
Orca: Killer whale mothers 'pay high price' for raising sons, say researchers | The Independent
