Tell me about animals.

Sheep: Sheep are mainly divided into goats and sheep. Living habits: 1, like humid environment, like living in mountainous hills or caves with moist and loose soil. Moreover, sheep like to sleep on higher ground. 2. Females and males live alone, but they will live together during the breeding season. 3. They like darkness, are afraid of sunshine, have poor eyesight, are sensitive to hearing, like quietness, and are afraid of being scared.

Why sheep are suitable for grazing in the wild: Because sheep are herbivores, and they have many natural enemies, which is related to their grazing habits, grazing can meet the requirements of its grazing room. Sheep also need to exercise by grazing in the wild to maintain their running genes.

Cattle: Like other ruminants, cattle have four stomachs: rumen, reticular stomach, bicuspid stomach and abomasum. Cattle eat grass in the first stomach, return to their mouths, chew in the second stomach, and so on.

Horse: heavy variety weight 1200 kg, height 200cm；; The small variety weighs less than 200 kg and is only 95 cm tall. The so-called pocket pony is only 60 centimeters tall. The head is straight and long and the ears are short. The limbs are long, the bones are solid, the tendons and ligaments are developed, and cicadas with palm and pillow traces (commonly known as night eyes) have hard hooves and can run quickly on hard ground. The coat color is complex, mostly dark brown, chestnut, blue and black. Take off the quilt in spring and autumn. Developed sweat glands are conducive to regulating body temperature, not afraid of cold and heat, and easy to adapt to the new environment. The chest is deep and wide, with developed heart and lungs, suitable for running and strenuous labor. Esophageal stenosis, single stomach and large intestine, especially cecum, are extremely developed, which is helpful to digest and absorb coarse grains. Without gallbladder, bile duct is developed. The chewing ability of teeth is very strong, and the gap between incisors and molars is called occlusal part, which is used to hold the occlusal body when driving. According to the number, shape and wear degree of teeth, the age can be determined (Figure 3), and the hearing and smell are keen. The distance between the eyes is large, and the overlapping part of the visual field is only 30%, so the judgment of the distance is poor; At the same time, the eye's focal length adjustment ability is weak, and it can only form a blurred image for objects 500 meters away, but it can distinguish the shape and color of nearby objects well. Only this animal can distinguish its color. The head and neck are flexible, and the visual area of both eyes reaches 330 ~ 360. There is a photosensitive film on the outer layer of retina, which has strong sensitivity and can see the surrounding objects clearly at night. Horses are easy to train. Through the sense organs such as hearing, smell and vision, a firm memory can be formed. The average life expectancy is 30 ~ 35 years old, and the longest can reach more than 60 years old. The service age is 3 ~ 15 years old, and some can reach 20 years old.

Donkey: ...