Aves saepe clarissimis coloribus ornantur. Propriam classem revera non fingunt, sed solae dinosauriorum progenies sunt, qui ex fine aevi cretacei adhuc exstant.
Aves multa affinia reptilibus exhibent, ex quibus procedunt. Agnoscuntur a zoologis paene 9800 specierum avium in viginti novem ordines digestarum. Ordines in 165 familias, vicissim in 2000 generum dividuntur. Aves sane valde sunt diversae, et se accommodaverunt ad locum vel oecosystema ubi habitant.
Hic habes cladogramma coniunctionum avium secundum Braun et Kimball (2021).[3]
Gauthier, J. A., et K. Queiroz. 2001. "Feathered dinosaurs, flying dinosaurs, crown dinosaurs, and the name Aves." In New perspectives on the origin and early evolution of birds: proceedings of the International Symposium in Honor of John H. Ostrom, et. J.A. Gauthier et L. F. Gall, 7–41. Portu Novo Connecticutae: Peabody Museum of Natural History, Yale University.
Opera generalia
del Hoyo, Josep, Andtrew Elliott, et Jordi Sargatal, eds. 2020. Handbook of the Birds of the World. 17 voll. Barcinonae: Lynx Edicions. Vol. 1: Ostrich to Ducks: ISBN 978-84-87334-10-8, etc.
Lederer, Roger, et Carol Burr. 2014. Latein für Vogelbeobachter: über 3000 ornithologische Begriffe erklärt und erforscht. Conv. ex Anglica a Susanne Kuhlmannn-Krieg. Coloniae: Verlag DuMont. ISBN 978-3-8321-9491-8.
Lesaffre, Guilhem. 2006. Nouveau Précis d’ornithologie. Lutetiae: Vuibert. ISBN 2-7117-7160-1.
National Audubon Society. National Audubon Society Field Guide to North American Birds: Eastern Region. Novi Eboraci: Knopf.
National Audubon Society, National Audubon Society Field Guide to North American Birds: Western Region. Novi Eboraci: Knopf.
National Geographic. 2017. National Geographic Field Guide to Birds of North America, ed. septima decima. National Geographic 2017. ISBN 9781426218354.
Perrins, C. 2003. The New Encyclopedia of Birds. Oxoniae: Oxford University Press.
Svensson, Lars. 2010. Birds of Europe. Ed. secunda. Princeton University Press. ISBN 9780691143927.
Svensson, Lars. 2010.Collins Bird Guide: The Most Complete Guide to the Birds of Britain and Europe. Ed. secunda. Collkins. ISBN 978-0007268146.