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The tail of a jerboa can be longer than its head and body, and a white cluster of hair is commonly seen at the end of the tail. Jerboas use their tails to balance when hopping, and as a prop when sitting upright. Jerboa fur is fine, and usually the colour of sand. This colour usually matches the jerboa habitat (an example of cryptic colouration).
The thick-tailed pygmy jerboa is a solitary nocturnal animal. It has a permanent burrow with many passages which may extend for 3 m (10 ft). The entrances are sealed with loose plugs of sand and if the jerboa is spotted in the open by a predator it attempts to bury itself in the sand.
The long-eared jerboa (Euchoreutes naso) [2] is a nocturnal mouse-like rodent with a long tail, long hind legs for jumping, and exceptionally large ears. It is distinct enough that authorities consider it to be the only member of both its genus, Euchoreutes , and subfamily, Euchoreutinae .
The northern three-toed jerboa has a head-and-body length of 100 to 155 mm (4 to 6 in) and a tail of 145 to 190 mm (5.7 to 7.5 in). The weight is between 56 and 117 g (2 and 4 oz). The upper parts are ochre-brown to reddish-brown, a white band stretches from the base of the tail across the hips, and the underparts are white.
The jerboa body length ranges from 5–15 cm and has a tail ranging from 7–25 cm. [7] The "forelimbs of the jerboa serve as a pair of hands for feeding, grooming, etc." [8] Jerboas use their nose to burrow and push the dirt when looking for food. [9] The male jerboa is usually larger in size and weight in comparison to the female jerboa. [10]
The thick-tailed three-toed jerboa (Stylodipus telum) is a species of rodent in the family Dipodidae. It is found in China , Kazakhstan , Russia , Turkmenistan , Ukraine , and Uzbekistan . Its typical habitat is steppe, desert and mountain grassland where it is often found among saltbush and Artemisia in sandy or clayey soils.
An adult greater Egyptian jerboa has a head-and-body length of about 13 centimetres (5 in) and a tail of 20 centimetres (8 in). The upper parts are yellowish-brown or sandy-brown and the underparts are white. The hind legs are very large and are about four times longer than the forelimbs. [3]
The tail is thickened by the adipose tissue beneath the skin and has a flattened, terminal, black bushy section. It can be distinguished from the rather similar thick-tailed three-toed jerboa (Stylodipus telum) by the fact that it has premolars in the upper jaw, these being vestigial in S. telum. [3]