The tassel squirrel is a species of chordates, mammals, rodents, squirrels, squirrels, distributed in Mexico (Chihuahua, Durango, Sonora), United States (Arizona, Colorado) , New Mexico, Utah, Wyoming).

1. Morphological characteristics
Do not hibernate. They mostly forage in forests on hillsides and river valleys. Active during the day, most active in the early morning, good at climbing and jumping on trees, and agile. Usually 1 or 2 more animals are active, but they migrate in groups when food is extremely poor. It is characterized by small size, molar teeth (including premolars) are 5/4 on each side of the jaw, 5 upper molars, no skin wings between the front and rear limbs, and a long hairy tail.
II. Habitat
It prefers to live in coniferous forests or mixed broad-leaved forests in the cold temperate zone or sub-cold zone. The habit of stockpiling food for overwintering.

Three, living habits
Moult every spring and autumn. Mostly in spring and summer, the estrus period is about two weeks. Litters 2 to 3 times a year, usually more in April and June. Generally herbivorous, the food is mainly seeds and nuts.
4. Distribution range
Distributed in Mexico (Chihuahua, Durango, Sonora), United States (Arizona, Colorado, New Mexico, Utah, Wyoming) )

5. Protection Level
IUCN Mammals