Thick-billed Parrot lives in groups of up to 1000 birds in Mexico and southwest US. American white pelican breeds in North America, migrates south for winter. Peregrine Falcon is world's fastest diving bird, capable of 390 km/h. Pheasants are invasive Asian/European birds, can live up to 18 years
Birds are warm-blooded vertebrates with feathers, wings, and hard-shelled eggs. There are 10,000 bird species worldwide, with 20% migrating annually. Birds evolved from theropod dinosaurs and have four-chambered hearts