민물가마우지가 물에서 나온 후 날개를 펼쳐 햇볕에 말리는 이유는 깃가지와 깃소유의 결합 형태가 물이 바깥쪽 깃털을 통과해 안쪽까지 쉽게 스며들도록 되어 있기 때문입니다. The Great Cormorants spread their wings in the sun after coming out of the water because the structure of their barbs and barbules allows water to easily penetrate past the outer feathers into the inner layers.
This species is considered endangered by the IUCN. According to its current IUCN classification EN C2a(ii), fewer than 5000 adult and first and second year old birds remain, and most of these are found in Primorye and South Khabarovsk regions of Russia 85%.
Scaly-sided Mergansers are migratory, wintering in central and southern China, with small numbers in Japan, South Korea, Taiwan, northern Vietnam, Myanmar and Thailand. They arrive on the breeding grounds as soon as winter is over, in March, and leave when the first cold nights come in mid November.
Adults have long yellow legs and a bill that is long, thin, and dark. The bill is longer than the head and often has a slight upward curve. The body is grey-brown on top and white underneath; the neck and breast are streaked with dark brown. The rump is white. It ranges in length from 29 to 40 cm and in weight from 111 to 250 g . Wingspan is 60 cm.
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