squirrels belong to the genus Squirrel of the family Squirrelidae in the animal classification. Usually of medium size, it is a typical representative animal in cold temperate coniferous forest and mixed forest. The limbs are strong, the toes have sharp claws, the claw ends are hooked, and the weight is usually about 35 grams. The female individual is slightly heavier than the male individual. Squirrels are slender and light, with a body length of about 18-26 cm and a long and thick tail, which is more than two-thirds of the body length, but less than the body length.

Squirrels are widely distributed and can be caught in the whole cold temperate forest area. In China, it is mainly distributed in the mountainous areas of three northeastern provinces, northeastern Inner Mongolia, Hebei and northwestern Shanxi, Ningxia, Gansu, Xinjiang and other provinces; Foreign countries spread from Russia's Far East, Japan, North Korea and northern Mongolia to the west and all the way to Western Europe. In coniferous forests, squirrels are not abundant every year, and their number depends on the number of conifer seeds in winter; Because its food is mainly plant seeds and fruits, seeds sometimes account for more than 95%; However, spruce seeds are not harvested every year. In the years when pine cones fail, squirrels will move to places with more food for food. And in years when food is abundant, it will multiply in large numbers.

Squirrel is a typical arboreal rodent species, which lives in mountain coniferous forests and coniferous-broad-leaved mixed forests, and uses branches, moss, feathers and so on as nesting objects to build nests among branches. The nests are round, and the exits are on the lee side, but some of them live in tree caves, and some of them are made up of old big nests. Squirrels can make several nests every year, which can be divided into main nests and auxiliary nests, and the auxiliary nests are used for temporary rest. Male rats seldom build nests, and most of them use old nests.

Squirrels mainly eat plant food, but also eat insects and their larvae, ant eggs, bird eggs and other animals, but the main food is the seeds of coniferous forests such as larch, and they eat more berries and mushrooms in summer. In the absence of food, we also eat the young buds of trees. Daytime activities, the most lively in the morning, not winter eyes, but the activities in winter are reduced, and when the winter is cold, there are few activities out of the nest.

Squirrels are not suitable for family breeding, but if you have a yard and trees at home, you might as well have a try.