Squirrels Squirrels (scientific name: Sciuridae) are a family of rodents in the class Mammalia, which include the subfamily Sciuridae and the subfamily African ground squirrels. They are characterized by their long, furry tails. Animals with other closely related relatives are collectively known as the squirrel-like suborder. Squirrels are generally small in size and mainly herbivorous. Their food is mainly seeds and nuts. Some species will feed on insects and vegetables. Some tropical species even migrate to hunt insects. The origin of squirrels is the northeast, northwest and Europe of my country. In addition to Oceania and Antarctica, they are distributed in other regions around the world. Squirrels (Figure 1) The fur on squirrels' ears and tails are particularly long and they are adapted to life in trees; they use long hook-like claws and tails to hang upside down from branches. At dawn and dusk, they will also leave the trees and hunt on the ground. After squirrels find abundant food in autumn, they will use tree holes or dig holes in the ground to store fruits and other food, and at the same time block the hole entrances with soil or fallen leaves. Squirrels have red hair all over their bodies in summer, but in autumn they change into black and gray winter hair that tightly wraps their bodies. Newborn squirrels are hairless and have unclear eyes. They do not start to grow hair until 8 days after birth. They open their eyes after 30 days. They can eat hard fruits in 45 days and become very agile. Squirrels are very docile little guys to their owners. We should also treat them gently, so that they will be devoted to you and will never hurt you with their teeth. Of course, they will gently nibble your fingers with their teeth and play with you. They will feel itchy, which is a sign of their friendliness towards you. When a squirrel sleeps, it uses its tail as a quilt to cover itself. Squirrels build nests on dense branches, or use the abandoned nests of crows, magpies, or other birds. Sometimes they also make nests in tree holes (Figure 2); in addition to eating wild fruits, they also eat twigs, young buds, leaves, as well as insect and bird eggs. As soon as autumn arrives, squirrels begin to store food. A squirrel often stores several kilograms of food in several places. Sometimes you can see squirrels drying food on trees to prevent it from going bad and moldy. In this way, in the cold winter, the squirrels will not have to worry about having nothing to eat.