Birds

Birds

Any feathered vertebrate.

Industry: Animals

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alice1

Beijing, China

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Birds

Patagial mark

Animals; Birds

The patagial mark is the dark patch closer to the body than to the outer edge of the wing underside when it is spread. It is located at the top of the wing closest to the head.

The neck connects the head to the body of the bird, homologous to the human neck. Different species have different neck lengths - the ostrich has many vertebrae in his neck area, while a hummingbird ...

Nasal fossa

Animals; Birds

The nasal fossa is a depression in which the bird's nostril is located. Generally, this area is located at the top of the bill and can be seen as two small punctures on the bill surface.

Ruffs

Animals; Birds

The ruffs are a fringe of feather growth on the neck of the bird. They are also used to signal good health and virility to potential mates. Unhealthy birds will have less full and less conspicuous ...

Primary numbering

Animals; Birds

The primary numbering is a system developed to assign numbers to each primary feather for easier identification.

Primary coverts

Animals; Birds

The primary coverts are shorter feathers that cover and protect the primary flight feathers.

Nictitating membrane

Animals; Birds

The nictitating membrane is the vertical semi-transparent fold under the eyelid. This is also the third eyelid of the bird and can be closed for protection. It has its own moisturising system similar ...