Outline of birds

The following outline is provided as an overview of and topical guide to birds:

Birds (class Aves) winged, bipedal, endothermic (warm-blooded), egg-laying, vertebrate animals. There are around 10,000 living species, making them the most varied of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from the 5 cm (2 in) bee hummingbird to the 2.75 m (9 ft) ostrich.

What type of thing is a bird

A bird can be described as all of the following:

  • Life form entity or being that is living or alive.
    • Animal multicellular, eukaryotic organisms of the kingdom Animalia (also called Metazoa). Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their lives. Most animals are motile, meaning they can move spontaneously and independently.

Biological classification

Nature of birds

Bird

Bird anatomy

Bird anatomy

Bird behavior

Bird behavior

Types of birds

Orders

Families

Subfamilies

Genera

History of birds

Study of birds

Aviculture

Aviculture

Bird diseases and parasites

Threats and conservation

Persons influential in the field of birds

Artists

Ornithologists

List of ornithologists

Writers

Birds in culture

See also

References

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