Birds

Birds

Any feathered vertebrate.

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alice1

Beijing, China

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Birds

Comb

Animals; Birds

The comb is only found in male birds and consists of a coloured area over the eye. A well developed comb can also signal (sexual) health to a potential mate.

Commissure

Animals; Birds

The hinge where the mandibles meet is called the commissure. In most birds only the lower jaw can move, just like in humans. Some birds can move both mandibles, such as parrots.

The crests are the tuft on the head of the bird. They are larger in males than in females. Although they increase visibility to predators, they also increase visibility to a potential mate. The more ...

Culmen

Animals; Birds

The culmen is the uppermost central ridge of the upper mandible. There is no specific function associated with it, but males tend to have a larger culmen than females.