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Birds

Any feathered vertebrate.

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Birds

Side

Animals; Birds

The side is the area between the belly, the wing and the back,. It is equivalent to the area between the human armpit and the hip bone.

Secondaries

Animals; Birds

The secondaries are flight feathers attached to the equivalent of the human elbow. They come behind the primaries in importance and location when viewed from the outermost edge of the wing.

Secondary coverts

Animals; Birds

The secondary coverts are the feathers that cover and protect the secondaries, and are attached to the "elbow".

Operculum

Animals; Birds

The operculum is a smooth and featherless patch of skin located where the beak attaches to the forehead of certain birds. It is often enlarged and brightly coloured such as one can observe in ...

Occiput

Animals; Birds

The occiput is the back portion of the birds crown. From this location, certain species adorn elongated feathers. It is also called the hindhead.

Nostril

Animals; Birds

The nostrils are the two small punctures on the top of the bill.

Mouth

Animals; Birds

The mouth is similar in function to the human mouth and refers to the cavity bounded by the bill, homologous to the human mouth. Many bird species feed their young by ingesting the food and ...

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