
Photo: Joseph Smit (1836–1929) · Public domain
Euchoreutes naso
Diet
Insects
Habitat
Sandy valleys, deserts, semi-deserts, and cold high-elevation desert
Range
Southern Mongolia and northwestern China
Size
Body length 70–90 mm; tail length 150–162 mm
The long-eared jerboa is a small desert rodent with a body length of 70–90 mm and a tail measuring 150–162 mm. Its reddish-yellow to light-russet upperparts contrast with a white belly, while the tail ends in a conspicuous black-and-white tuft. Its exceptionally long ears extend well beyond the head, and its elongated hind feet have bristly hair tufts that help distinguish it from other small rodents. The three central metatarsals are partly fused, and the sexes are externally similar. (Animal Diversity Web)
This jerboa inhabits arid and semi-arid landscapes from southern Mongolia into northwestern China, including sandy valleys, the Takla-Makan Desert, the Aerjin Mountains, and the Qing-Zang Plateau. Collection sites typically have sparse, low-growing shrubs. It is insectivorous and can locate flying insects by sound before catching them with rapid leaps. The animal is principally ground-dwelling and adapted for both burrowing and saltatory locomotion. Its unusually acute hearing assists foraging and may also help it detect nocturnal danger. (Animal Diversity Web)