It is said that the red-crowned crane is monogamous and will only find one partner in his life, even if one dies, the other will not live alone. Is that so?

Red-crowned cranes are taxonomically located in vertebrates, birds, cranes and cranes.

Red-crowned crane is one of the large wading birds. It is a world-famous rare bird. Red-crowned crane is tall, standing about 1.5m, with a body length of 1.4 ~ 1.5m and a weight of 10 ~ 12kg. The female crane is slightly smaller. Red-crowned crane is named for its bare and hairless skin and its scarlet color. The scarlet on the head of the black-necked crane is not as red as that of the red-crowned crane, nor is it so prominent and big. On the head of the black-necked crane, there is a long beak, which is gray-green. Most of the feathers of the whole body are white, only most of its cheeks, throat and neck are black, and the flying feathers of its wings are not only black, but also shiny. When the feathers of the wings are collected, they cover the short white tail. Some people mistakenly think that the tail feathers of red-crowned cranes are black, but they are not. People familiar with the matter described the body color of the red-crowned crane as "white tail, black tail, red top and green beak", which is correct. It also has two slender legs, which are drilled black and can reach to the feet. This makes its figure look slim, elegant and graceful.

Red-crowned cranes mainly inhabit shallow waters near lakes and rivers, swamps with reeds, or wetlands with lush aquatic plants. Usually there are relatively high emergent plants such as reeds in the habitat, which is convenient for concealment.

The red-crowned crane walks in shallow water with long slender legs, looking for food. They generally eat animal foods such as fish, shrimp, insects and frogs, and sometimes they also eat roots, stems, leaves and buds of Gramineae plants. Therefore, the red-crowned crane is an omnivore with a wide range of feeding habits and is easy to raise.

Red-crowned cranes like to live in groups, often 3-4 of them wade for food together in a family way, and they also move together in pairs.

Spring has come, and the red-crowned crane flies back to the breeding area with its young cranes. Before entering the mating period, the male crane will drive away the young cranes at home. Generally speaking, it is not easy to drive away the crane, but it must be driven away again and again. The driven young cranes began to act alone, and later they got together to form a group of young cranes and left their parents.

The red-crowned crane is monogamous. If one side dies, the other side will be heartbroken and cry. When red-crowned cranes mate, male and female cranes will dance and sing loudly. Because the female crane sings a little lower than the male crane, it sounds like a duet. A few hours before the female crane lays eggs, the male crane and the female crane nest together. Their nests are simple. Generally, stems, leaves, inflorescences, dry reeds and mosses of aquatic plants are used to build nests. Nests are usually built near the water or deep in reeds with tall plants as barriers, which is difficult for people and large mammals to reach. The bird's nest is shaped like a big disk.

Female cranes usually lay eggs from mid-April to mid-May, with an annual output of one nest, usually two nests per nest and occasionally three nests. The egg is large, weighing 250 ~ 300 grams, and its shell is thick and hard, and it is grayish brown. The surface of the egg is covered with brown spots. If eggs are destroyed, they also have the habit of replenishing eggs. Male and female cranes hatch eggs in turn, and most of the tasks of hatching eggs at night are completed by female birds. During the incubation period, the parent crane turns the eggs with its beak once, about 1 hour, so that the eggs are cooled, and the cooling time of the eggs is about 1 ~ 2 minutes. The new crane can also determine the number and time of egg cooling according to the weather temperature. After 3 1 ~ 33 days, the young cranes hatch. Before hatching, the young crane pecked a small hole in the eggshell with its beak and gradually expanded the hole. At this time, the mother crane anxiously waits for the hatchling to hatch, which takes about 25 ~ 26 hours. When the chick hatched, the parent bird spread its wings and danced like a treasure, always guarding the chick. The newly hatched chicks weigh about 65438 0.50 g, with yellow feathers, dark back midline and light abdomen. You can open your eyes when hatching, stand after 2-3 hours, and eat after 1 day.

Young birds are precocious birds. They can learn to walk by themselves, but they can't live without their parents. Soon, young birds can follow their parents to wade in shallow water for food, mainly eat small fish, insects, tadpoles and the tender teeth of various plants. Little cranes can also learn to jump, spread their wings and comb their feathers like their parents. Young cranes develop rapidly. From late September to1early October, young birds fly south with their parents for the winter. Young cranes are sexually mature when they are 4-6 years old, and their life span is generally 50-60 years old, and some can live up to 80 years old.

The female and male red-crowned cranes are basically the same in appearance, and there is no difference, but the body feathers of the female crane are slightly deeper and shallower, which is not as gorgeous as that of the male crane. It is found that the calls of male and female cranes are different from their habitual movements. When the male crane crows, his neck stands high, his head leans back, his beak goes straight into the blue sky, his wings are raised high, but he doesn't spread completely, and he makes a continuous single tone. When the female crane barks, her beak extends horizontally forward, her wings are not high, and her voice is not as loud as that of the male crane. Although the calls of female cranes are slightly smaller than those of male cranes, their calls can all be called neck-pulling. The sound can be as loud as two kilometers away. People distinguish male and female cranes by their calls and behaviors.

The red-crowned crane is a typical migratory bird. According to the investigation, the lowland swamps in the lower reaches of Heilongjiang River and Wusuli River basin in the northeast of Songnen Plain are the breeding areas of red-crowned cranes in China. China has established the first comprehensive waterfowl nature reserve in Zhalong area of Northeast China, which is dominated by red-crowned cranes. In the nature reserve, due to the careful management of the breeder, the wild red-crowned crane did not fly south for the winter, but settled down. Later, China successively established Xianghai Nature Reserve and Momoge Nature Reserve in Jilin Province, Shuangtaizi Estuary Nature Reserve in Liaoning Province and Jinshenghu Nature Reserve in Anhui Province. Red-crowned crane is a rare bird in the world, and it is listed as a first-class protected bird in China. (I'm early)