Bing found the following results
Is an Orca a Whale or a Dolphin? (Explained) - Wildlife Informer
Orca - Wikipedia
Orcas (Killer whales) - National Geographic
Facts about orcas (killer whales) - Whale & Dolphin Conservation …
Orcas - National Geographic Society
Killer whale | Definition & Facts | Britannica
Are Orcas Not Whales But Dolphins? | Snopes.com
Killer Whale | NOAA Fisheries
Facts about orcas (killer whales) | Whale and Dolphin …
Killer Whale Fact Sheet | Blog | Nature | PBS