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

Do three-legged parrots exist? - Discover Wildlife

Meet the Dipper, the Songbird That Swims

We Helped Scientists Track Birds This Summer. - The New York Times

Northern mockingbird - Wikipedia

The Monk Parakeet: A New York Success Story — NTVLI

Pangolins: 13 facts about the world's most hunted animal

We Helped Scientists Track Birds This Summer. - The New York Times

Rose-ringed parakeet - Wikipedia

Secretarybird - Wikipedia

Scientists find animal that walks on three limbs: A parrot

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