The Significance of Dante in Red-crowned Crane

Lead: The red-crowned crane is actually a kind of crane, but why is it called the red-crowned crane? Every animal's name has its origin and meaning. Since it is called a red-crowned crane, it naturally has its reasons. So, do you know what the red-crowned crane refers to? Why is the red-crowned crane called the red-crowned crane? Let's understand the meaning of Dante of red-crowned crane.

What does the red top of the red-crowned crane mean?

A red scalp without feathers. Red-crowned cranes are named after bright red spots on their heads. The red area on the head of the red-crowned crane is actually a hard skin with no feathers on it. Simply put, it is baldness, and there are many blood vessels under the scalp, so it is red. Red-crowned crane and crane crown are two completely unrelated things.

Red-crowned crane is a large wading bird of Crane, with a body length of 120- 160 cm. The neck and feet are long, mostly white, the top of the head is bright red, the throat and neck are black, the ears to the headrest are white, the feet are black, the tail feathers and feet are black when standing, the top of the head is red, and the rest are white; When flying, only the second and third flight feathers, neck and feet are black, and the rest are white, which is extremely obvious and easy to identify. The bird's head and neck are brown and its feathers are white and chestnut.

Ethnic groups and small groups that often pair up or get married. In the migration season and winter, several or dozens of family groups often form larger groups. Sometimes there are as many as 40-50 clusters, even more than 100. However, when they are active, they are still scattered in small groups or family groups in a certain area. At night, they mostly inhabit shallows surrounded by water or the edge of reed ponds, and mainly feed on the stems, leaves, tubers, bulbs and fruits of fish, shrimp, aquatic insects, mollusks, tadpoles, nereis, clams, snails and aquatic plants. Distributed in northeast China, eastern Mongolia, east bank of Russian Ussuri River, North Korea, South Korea and Hokkaido.

Morphological characteristics:

The red-crowned crane is about160cm long, with a wingspan of 240cm and a weight of 7000-10500g. The whole body is almost pure white, and the top of the head is bare and hairless, vermilion. The forehead and eyes are slightly Kuroha, the ear feathers behind the eyes are white to the pillow, and the cheeks, throat and neck are black; The second and third flight feathers are black, and the third flight feathers are long, curved and arched, covering the tail. Therefore, when standing, the tail is black, but it is actually a three-level flight feather, while the tail, the first-level flight feather and the whole body feather are all white, which is very obvious when flying. The mouth is very long, light green and gray, and the neck and legs are also very long. The long and curved flight feathers between wings are black, and the whole flight feathers cover the tail when standing, which often makes people mistakenly think that it has black tail feathers. Both men and women are similar.

The iris is brown, the mouth is grayish green, and the tip is yellow. The exposed parts of tibia, tarsometatarsal and toes are gray-black, and the claws are gray.

The chicks are covered with tawny down feathers, with light back, deep abdomen, milky white shoulders and red mouth and legs. After 3-4 months, the body feathers gradually turned white, and the exposed part of the top of the head did not appear red until 10 months later.

The red-crowned crane's skeleton is hard outside and hollow inside, and its strength is seven times that of human skeleton. Moreover, when it migrates, it is often arranged in a clever wedge shape, so that the individuals behind can make use of the airflow generated when the individuals in front flap their wings in turn to fly quickly, laboriously and persistently. The speed can reach about 40 kilometers per hour, the flying height can exceed 5400 meters, and you can sing while flying.

Demographic status:

Red-crowned crane needs clean and open wetland environment as its habitat, which is the most sensitive indicator of wetland environment change. Due to the increasing number, the habitat of red-crowned crane has become farmland or city. For example, the Moon Bubble in the west of Jilin Province used to be the breeding ground for red-crowned cranes. Due to the artificial embankment around the lake, the water level in the embankment rose, the emergent vegetation zone basically disappeared, the lake outside the embankment dried up and was reclaimed as farmland, and the red-crowned crane disappeared. Another example is the swamp area between Shaobo Lake and gaoyou lake in northern Jiangsu, which used to be the wintering ground for red-crowned cranes. Due to the increasing number of people fishing, grazing and hunting in this area every year, human interference, egg collection and poaching have increased, resulting in a sharp decline in the number of red-crowned cranes.

By 2065,438+00, the total number of red-crowned cranes in the world is estimated to be only about 65,438+0,500, of which about 65,438+0,000 are wintering in China. More and more people begin to pay attention to protecting the red-crowned crane and its living environment. China has established 18 nature reserves to protect red-crowned cranes, among which Xianghai in Jilin, Dongting Lake in Hunan, Bird Island in Qinghai and Poyang Lake in Jiangxi have also been included in the international wetland list protected by Ramsar Treaty, and great progress has been made in the protection work.