The types of squirrels are red-bellied squirrel, variegated squirrel, Petter long-nosed squirrel, Yucatan squirrel, rock squirrel, giant squirrel, chipmunk, snow squirrel, Japanese squirrel, North American red squirrel, European red squirrel, North American gray squirrel, tricolor squirrel, red-cheeked long-nosed squirrel, red-cheeked long-nosed squirrel and orange-throated long-nosed squirrel.

Red-bellied squirrels inhabit tropical and subtropical forests, and are also found in vegetation environments such as secondary forests, logging sites, hilly terraces, coconut forests, shrubs, bamboo forests, mixed forests of trees and bamboo forests, Pinus massoniana forests, fir forests and shrubs. They are arboreal animals.

Long-nose squirrel is slender, its tail is shorter than its body length, its tail hair is fluffy, its forelimbs are 4 fingers, its hind limbs are 5 toes, its back hair color is olive yellow-gray from beginning to end, its sides and outer limbs, its mandible and abdomen hair bases are light gray, and the rest are white.

Long-nosed squirrels mainly live in trees, mostly in trees beside valleys and rivers. It moves at dawn and dusk, sometimes running from trees to the ground, walking across the grass, and also moving in fallen trees in the forest, looking for food while moving.