The Red-crowned Crane (Grus japonensis), also called the Japanese Crane or Manchurian Crane is a large east Asian crane and among the rarest cranes in the world. In some parts of its range, it is known as a symbol of luck, longevity and fidelity.
In the spring and summer, the migratory populations of the Red-crowned Crane breed in Siberia (eastern Russia), northeastern China and occasionally in northeastern Mongolia. Normally the crane lays 2 eggs, with only one surviving. Later, in the fall, they migrate in flocks to Korea and east-central China to spend the winter. Vagrants have also been recorded in Taiwan. In addition to the migratory populations, a resident population is found in eastern Hokkaidō in Japan. The habitats used are marshes, riverbanks, rice fields, and other wet areas.
The estimated total population of the species is only 2,750 in the wild, including about 1,000 birds in the resident Japanese population. Of the migratory populations, about 1,000 winter in China (mainly at the Yellow River delta and Yancheng Coastal Wetlands), and the remaining winter in Korea.
Source: en.wikipedia.org/wiki/Red-crowned_Crane - 14.12.2011
The different beaks of the birds are in each case good in the line with the remaining body shapes.