There's an Animal That Walks on Three Limbs. It's a Parrot. - The New York Times

Search for Lost Birds: Finding the most wanted birds in the world

Polly's got a third leg! Parrots are tripods, use beak as extra 'limb' to climb, new study finds

Parrots Climb Using Three Limbs, Thereby Violating The 'Forbidden Phenotype

Four legs bad, two legs good? Changing posture in a growing dinosaur, Dinosaurs

Cassowary - Wikipedia

The pet I'll never forget: Friday the parrot bullied, confused, embarrassed and bewitched us, Pets

Parrots Show Off Selfless Behavior - The New York Times

Parrots: The Highlight Reel - The New York Times

The Cassowary Is the World's Most Dangerous Bird

Why L.A. parrots are getting louder - Los Angeles Times

The Thrill of Discovery, News

Flamingo, Description, Feeding, Images, & Facts