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List of bird genera concerns the chordata class of aves or birds, characterised by feathers, a beak with no teeth, the laying of hard-shelled eggs, ...
Birds are a group of warm-blooded vertebrates constituting the class Aves (Latin:), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
In total there are about 10,000 species of birds ... recognized within the taxonomic class Aves and consist ... birds belong to the subclass ...
There are 107 classes of animals in 33 phyla in this list. However, different sources give different numbers of classes and phyla. For example, Protura, Diplura, and Collembola are often considered to be the three orders in the class Entognatha. This list should by no means be considered complete and authoritative and should be used carefully.
This category lists orders of birds (ending in "-formes") as categories, and pages dealing with certain (non-taxonomic) groups of birds. The first section links to categories listing lower taxonomic levels in birds. In the second section, higher categories such as superorders, and basal groups are listed.
Birds are bipedal, warm-blooded, egg-laying vertebrates characterized primarily by feathers, forelimbs modified as wings, and hollow bones. This category contains taxa at the order or higher level in the class of Aves. Unlike Category:Prehistoric birds, which covers all prehistoric avialans, even non-neornithines, this category only covers ...
Class Aves (birds) Infraclass Lepidosauromorpha. Superorder Lepidosauria. Order Rhynchocephalia (tuataras) Order Squamata (lizards, snakes) Subclass Anapsida.
Accipitrimorphae is a clade of birds of prey that include the orders Cathartiformes (New World vultures) and Accipitriformes (diurnal birds of prey such as eagles, hawks, osprey and secretarybird).