Toro

Isothrix bistriata

SUBFAMILY

Echimyinae

TAXONOMY

Isothrix bistriata Wagner, 1845, Río Guaporé, Brazil.

OTHER COMMON NAMES

English: Yellow-crowned brush-tailed tree rat.

PHYSICAL CHARACTERISTICS

Fur long and soft, no spines. Upperparts are yellowish gray, orange, or pale yellow below. Head has a pale yellow crown, extending onto neck. Below this is a wide black stripe that nearly merges on nape. The tail is long and thickly furred, with orange-yellow fur closer to the rump and black toward the end. Feet are short and broad with strong claws.

DISTRIBUTION

Amazon and Orinoco basin rainforests, as well as eastern Peru and Bolivia.

HABITAT

Primary forest, near streambanks.

BEHAVIOR

This species is nocturnal, and feeds in trees in a squirrel-like manner. It dens in a hole in a small tree (often a dead palm) some 33 ft (10 m) from a favored tall tree, and spends afternoons with its head sticking out of the den hole. Some levels of sociality are possible, as small groups have been observed foraging together.

FEEDING ECOLOGY AND DIET Nothing is known.

REPRODUCTIVE BIOLOGY

Little known. Litter size is probably one.

CONSERVATION STATUS

Lower Risk/Near Threatened.

SIGNIFICANCE TO HUMANS None known. ♦

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