Summary ²

Birds (class Aves or clade Avialae) are feathered, winged, two-legged, warm-blooded, egg-laying vertebrates. Aves ranks as the tetrapod class with the most living species, approximately ten thousand. Extant birds belong to the subclass Neornithes, living worldwide and ranging in size from the 5 cm (2 in) Bee Hummingbird to the 2.75 m (9 ft) Ostrich. The fossil record indicates that birds emerged within the theropod dinosaurs during the Jurassic period, around 150 million years ago. Birds are the only living...

Fuentes y créditos

1. (c) Kenny P., algunos derechos reservados (CC BY-NC), http://www.flickr.com/photos/23084352@N00/499334547
2. (c) Wikipedia, algunos derechos reservados (CC BY-SA), http://en.wikipedia.org/wiki/Aves

Más información

• NaturalistaCR página del taxón
• Biodiversity Heritage Library
• BOLD Systems BIN search
• change linear sequence of orders to place Galliformes and Anseriformes after Tinamiformes
• Cornell Lab of Ornithology
• Global Biodiversity Information Facility (GBIF)
• VertNet

NaturalistaCR Mapa