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Overview x Zoology and Animal Sciences x clear all

aardvark

Overview page. Subjects: Zoology and Animal Sciences.

Few people have had the fortune of a close encounter with the aardvark, one of Africa's most bizarre and specialized mammals. Nocturnal and secretive, this ant and termite...

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abaptation

Overview page. Subjects: Ecology and Conservation — Zoology and Animal Sciences.

The process by which an organism is fitted to its environment as a consequence of the characters it inherits, which have been filtered by natural selection in previous environments. Because...

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abdomen

Overview page. Subjects: Medicine and Health — Zoology and Animal Sciences.

That part of the body cavity below the chest and separated from it by the diaphragm. It contains a number of organs including the stomach, liver, kidneys, spleen, pancreas, and intestines.

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abdominal fins

Overview page. Subjects: Zoology and Animal Sciences.

1 In fish, pelvic fins located far back on the belly rather than in the thoracic or jugular position.

2 Ventral fins located on the abdominal (belly) side...

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abnormal behaviour

Overview page. Subjects: Zoology and Animal Sciences.

Behaviour that occurs as a result of a pathological condition, including anxiety and stress. Abnormal behaviour is sometimes seen in animals in captivity, where it may take the form of...

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abomasum

Overview page. Subjects: Zoology and Animal Sciences.

In Ruminantia, the fourth and final region of the specialized stomach, corresponding to the stomach in other mammals and the zone in which digestion proceeds with the usual mammalian...

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aboral

Overview page. Subjects: Zoology and Animal Sciences — Earth Sciences and Geography.

Away from the mouth; on the opposite side of the body from the mouth in animals that lack clear-cut dorsal and ventral surfaces.

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Abrocomidae

Overview page. Subjects: Zoology and Animal Sciences.

; order Rodentia, suborder Hystricomorpha)

A family of medium-sized, rat-like rodents that have stiff hairs projecting over the nails of the three central digits of the hind feet....

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abyssal fish

Overview page. Subjects: Zoology and Animal Sciences — Ecology and Conservation.

Fish that live in the deepest part of the ocean, below about 2000m. Many abyssal species have prominent snouts; a tapering, rat-tailed body consisting of flabby, watery tissue; and a...

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Acanthizidae

Overview page. Subjects: Zoology and Animal Sciences.

; class Aves, order Passeriformes)

A family of birds all of which build domed nests. They have thin, pointed bills with basal bristles, are insectivorous, and vary from being...

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