Crane is (grus): Crane Crane Division 1-shaped head is. Large migratory waders. Head is usually bare, stiff mouth, nostrils was like crack; 11 primary feathers, secondary feathers longer than the primary flight feathers; tibia, tarsal and toes are long and thin, after a small toe, and toe position higher than the previous 3 . World 10 species, China has eight. Habitat in the wetlands, grasslands, or broad fields. Camp ground life, from the constant habitat trees. Flying head, neck and front legs straight, and often arranged in neat formation. Chicks as early as sex.
Red-crowned cranes and black-necked cranes in China is most famous. Red-crowned cranes breed in northeast China, also found in southeastern Siberia, northern Korea and Hokkaido, Japan. Black-necked cranes are mainly distributed in China Qinghai-Tibet Plateau. Mouth green-brown, the exposed part of the red head, head, neck, tail, primary and secondary flight feathers, flight feathers are black, the other white body feathers. Male and female feathers same color. Body of adult birds is about 1.2 meters high and weighing about 6,500 grams. Main habitat in the highland meadow marsh, swamp reed swamps or lakes. In mid-March each year in groups after migration to the breeding grounds, and gradually spread in pairs. Estrus mating time is normally in the morning. Female courtship call and issued the first crane, then male and two picks and neck for straight up, and jump the fan Liang Chi, this is the so-called "Crane Dance." After mating the same time sing, a voice a few years. Out of the water in the swamp grass on the pier, or reeds, is surrounded by shallow water on the nest, with moss grass, needle rush, reeds piled. 2 eggs per year. Blue pebble board, blunt end of a brown color spots. Incubation period of 31 to 33 days, male and female incubation rotation. Newly hatched chicks, mouth meat, red, brown body feathers, tarsus TANSEI gray, is back by nature. Rapidly growing young cranes, 30 to 90 day weight gain of 34 per day to 100 grams; 90 days the young birds into the crane body and is similar to the flight feathers have fully developed. October each year, Young led the black-necked cranes cranes migrate south to leave the breeding grounds. In the wintering area, still choose marsh habitat, and a mixture of common black-necked cranes and crane group.
Crane is located in China and six species are: crane, hooded crane, white-naped crane, white crane, Sarus Crane, sand cranes, of which the largest number of common crane, widely distributed; the least number of cranes, endangered species, only sand dunes Crane is occasionally seen. |