Squirrels have been listed in the Vertebrate Volume of the Red List of Biodiversity in China, with an assessment grade of nt and the Red List of Endangered Species in IUCN.
Squirrel is a typical small arboreal animal with a slender body, which is particularly small against the soft and thick hair. Body length is 20 ~ 28 cm, tail length is 15 ~ 24 cm, weight is 300 ~ 400 g, eyes are big and bright, ears are long, and there is a bunch of hair at the tip of ears, especially in winter. Summer hair is dark brown or reddish brown; The winter hair is gray, smoky gray or grayish brown, and the belly hair is white. Slender limbs, long hind limbs, and sharp claws on fingers and toes. The tail hair is fluffy and often rolls back.
Squirrels have the following habits:
1. Squirrels hang upside down on branches with their long hooked claws and tails.
2. At dawn and evening, they will leave the tree and hunt on the ground.
3. After finding enough food in autumn, squirrels will use tree holes or dig holes in the ground to store fruits and other foods, and at the same time block the hole with dirt or fallen leaves.
4. Squirrel will lick human fingers gently with its teeth and play with human beings, which is its friendly performance to human beings.
Squirrels sleep with their tails covered with quilts.
6. Squirrels build nests on dense branches, or use nests abandoned by other birds, and sometimes build nests in tree holes.