OUTDOORS: War birds have quite the history

Warbird Relic Hunters of the Wild West — Vintage Wings of Canada

Yes, crows really do form gangs, and they fight to win: UBC research

Outdoor Fun: 50 Bird Species and the Sounds they Make - Outdoor Benches for Park Activities

Warbird Relic Hunters of the Wild West — Vintage Wings of Canada

FAQ: Outdoor Cats and Their Effects on Birds

Why Vultures Might Just Be the Smartest Birds Above the Block - The New York Times

How the Chicken Conquered the World, History

Man-o-war Birds - 10,000 Birds

A History of How Humans Learned to Fly - Let's Talk Science

Birds in Battle

Swamp Thing: The DCU Monster's Origin and History Explained - IGN

FEATHERS AND FLAK: The Inextricable Link Between Birds and War

The Legend of What Actually Lived in the No Man's Land Between World War I's Trenches, History