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单词 Ursus ursinus
释义

Ursus ursinus

英语百科

Sloth bear

Skulls of a Sri Lankan sloth bear (left) and a common sloth bear (right) from the Muséum national d'histoire naturelle
Sloth bear skull: Note the lack of two upper incisors.

The sloth bear (Melursus ursinus), also known as the Stickney bear or labiated bear, is a nocturnal insectivorous bear species found wild within the Indian Subcontinent. The sloth bear evolved from ancestral brown bears during the Pleistocene and shares features found in insect-eating mammals through convergent evolution. The population isolated in Sri Lanka is considered a subspecies. Unlike brown and black bears, sloth bears have lankier builds, long, shaggy coats that form a mane around the face, long, sickle-shaped claws, and a specially adapted lower lip and palate used for sucking insects. Sloth bears breed during spring and early summer and give birth near the beginning of winter. They feed on termites, honeybee colonies, and fruits. Sloth bears sometimes attack humans who encroach on their territories. Historically, humans have drastically reduced their habitat and diminished their population by hunting them for food and products such as their bacula and claws. These bears have been used as performing pets due to their tameable nature. The species is listed as Vulnerable by the IUCN due to habitat loss and poaching.

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更新时间:2025/6/21 15:38:44