a migratory sandpiper with a downcurved bill and (in the breeding season) a reddish-brown back and black belly. It is the commonest small wader of the northern hemisphere 黑腹滨鹬
Calidris alpina, family Scolopacidae 拉丁名Calidris alpina, 鹬科
语源
mid 16th cent.: probably from dun + -ling, from the greyish-brown winter colouring of its upper parts