The parts of a bird. One of the main ingredients to describing a bird is being able to name the various parts. Instead of just naming the wing, you are able to tell the primary from the secondary from [..]

An abnormal lack of pigment.

Mutually exclusive geographically as contrasted with sympatric

Separated geographically; usually refers to closely related species or subspecies whose breeding ranges, although adjacent, do not overlap. In this situation the possibility of interbreeding cannot be [..]

The spring plumage which is also referred to as the breeding plumage; the

(From Wikipedia) The American Ornithologists' Union (AOU) is the oldest and largest ornithological organization in the Western Hemisphere. Unlike the National Audubon Society, its members are pri [..]

From Wikipidia: "Amphipods range in size from 1 to 340 millimetres (0.039 to 13 in) and are mostly scavengers. There are more than 9,500 amphipod species so far described. They are mostly marine [..]

Formerly the living world was divided into two

An example of

Interpreting the behavior of non-human animals in terms of our understanding of human animals. There are some needs such as the need to eat, sleep, drink water, that are very similar between humans an [..]