Are crows all black?

Classification: Education/Science >> Science and Technology

Analysis:

breakdown

Crow is a general term for several black birds of passeriformes. It is the largest individual among passerine birds, with a body length of 400 ~ 490 mm; Feathers are mostly black or black and white, and Kuroha has a purple-blue metallic luster; Wings are much longer than tails; The mouth, legs and feet are pure black. There are 36 species of crows, which are distributed almost all over the world. There are 7 species in China, most of which are resident birds. In the vast plains of China from east to northeast, bald-nosed crows nest in tall trees. They are all black, with no feathers behind their mouths and gray skin. White-necked crows nest in tall trees from the southern plains of North China to the low hills, rarely forming groups, with black feathers and obvious white-collar belts. Western jackdaw in the west is a common crow in the vast mountainous areas and near mountainous areas in northern China. Its chest, abdomen and collar are white, and the rest are black. I like to build nests in cliff holes, tree holes and gaps in tall buildings. Crows with large mouths breed in the vast mountainous areas south of northeast China, with large bodies, thick mouths and black bodies. Raven is the largest individual among crows, with a body length of about 600 mm and a black body. Most of the body feathers, wings and tail feathers have blue-purple or blue-green metallic flashes, and the mouth is very thick. In the plateau and mountain crevices above 3000 meters above sea level in * * * Autonomous Region.

Xinhua News Agency, Urumqi, July 12 (Reporter Zhao Feng) As the saying goes, crows are generally black, but in Yumin, Xinjiang.

In Chahantuohai Ranch, a Kazakh student recently found a white crow.

Kazakh students found that one of the crows was white. He was curious and tried to put it.

The white crow was caught and put in a crow's nest on a tree. But he saw that the other black crows in the nest were very different from the white crows.

Be friendly and discuss in groups. This white crow has pure white fur, light yellow mouth and claws. It sounds like a black crow.

This white crow caused a sensation in the local area, and people went to watch it. Lin Qinghang, a cadre of the Propaganda Department of Yumin County Committee, reported.

Tell the reporter, I don't know if this white crow is a genetic variation or a new breed. It's not clear yet. At present, this Wu Bai

Crows were released into nature.

A white crow was found in Huangling.

Bj.sina065438+1October 65438+April 14: 05 Xi 'an Xinwen. com -Xi 'an Evening News

It is said that crows in the world are generally black, but the reporter recently saw a white crow in a coal mine in Huangling.

The coal mine where the white crow was found is located by the He Ju River in Shuanglong Town, huangling county. The banks of He Ju are shaded by trees, with a forest coverage rate of over 70%. The natural environment is good and there are many birds and animals. There are many crow nests on the branches by the river, and crows are in droves. Among crows, a white crow stands out. This crow is about 30 centimeters long. Except Darkmouth, everyone is white.

Feathers and even legs are white. According to a local miner, this white crow appeared at the end of last year and came out to feed with other crows during the day, attracting many people to stop and watch. Tongchuan TV reporter who was with them took a group of precious white crow shots, but due to the limited zoom of the camera, our reporter did not take them as expected.

The reporter visited animal experts in this regard. Experts explained that albinism exists in animals, such as white snakes and white deer, but it is rare in birds. This white crow may be a mutation phenomenon.

There are also gray crows, also known as Eurasian carrion crows.