Who can help me describe what the nutria looks like and what its characteristics are?

The external image of beaver is beaver, but its tail is long and conical (beaver tail is flat). Beaver's eyes are small and oval, and their eyesight is better than that of arc light in day and night. Small ears are oblate, and the ear shells are black, mostly covered with fluff. There is a special flap in the ear hole, which is closed when diving to prevent water from flowing into the ear; Sensitive hearing, can detect very subtle sounds in the surrounding environment. Beavers have a poor sense of smell, and the upper lip has light brown tentacles, which have a tactile effect.

Beaver's limbs are thick and short, the forelimbs are slightly shorter than the hind limbs, there is no exercise between the front toes, and there is exercise between the rear toes. The training distance is 2.5-3.5cm, and the toes are bright and hairless, and the hind palms can support the body to stand. When swimming, the stroke of the back palm plays the role of stroke, and the swimming speed is very fast Forepaws have the functions of defending natural enemies, grasping food and tearing into the mouth. The tail is about 30-40cm long, mostly dark brown, with sparse coarse hair and horny scales on the surface. When swimming and diving, the tail can act as a rudder and master the direction of progress.

In the wild state, nutria often inhabit ice-free streams, lakes and swamps all the year round, and plants in aquatic swamps flourish. They dig holes and build nests in overgrown places or on steep slopes near lakes. The nest is 40-50 cm in diameter, 20-30 cm in aperture and 200-300 cm in length. This hole is often half submerged and half exposed to the water. The hole is not covered, and the tunnel is not bifurcated. With the change of water level, food, seasons and the need of reproductive behavior, beaver rats often change their habitats.

In nature, nutria like to eat some swamp plants, such as the roots, stems and leaves of water lilies, mats, cattails and other plants, and occasionally they also eat mollusks such as mussels. In the case of artificial breeding, I like to eat tubers, tubers and starchy foods, such as potatoes, carrots, arrowhead peas, green-cut barley, wheat and so on.

The posture of nutria eating feed is quite interesting. Use the tail base to support the body in a crouching position, and grab the feed with one front paw or two front paws to chew. There is also the act of dragging feed into the water. Feeding time is mostly in the morning and evening. In the wild, nutria moves in the morning and evening, likes warm climate, and has poor heat and cold resistance.

The nutria is good at swimming and diving, and is very flexible in the water. The diving time can be as long as 5-6 minutes, and the diving depth can be 30-40 meters, and the diving distance is more than 50 meters. When the nutria swims in the water, its head and nose are exposed to the water for breathing. The head, body and tail are in a horizontal straight line to reduce swimming resistance. On land, nutria is clumsy, hunched when walking and hunched when squatting.

In summer, when the weather is hot (the temperature is above 25℃-28℃), nutria mostly lie in the shade to rest instead of swimming in the water. Every morning from 8: 00 am to afternoon 10, and in the afternoon 15- 18 or so, the nutria swims in the pool for a while before and after feeding, and then goes ashore to comb their fur and head and face. Feces are rarely discharged on the ground of the fence, but mostly in the pool.

There is no obvious seasonal change in the hair loss of nutria, which is gradual all year round, usually in March-May and August every year. The coat is sparse in spring, thin and short in summer, and dense and shiny in autumn and winter. The shedding and growth of coat are also affected by dietary nutrition level, environmental temperature, humidity, photoperiod, individual gender, age and other factors.

The nutria is timid and easily frightened, but it is easy to domesticate in a secluded environment. The life span is generally 8 19 years, and the reproductive capacity is the strongest between 7 months and 4 years old.