grayback

英

美

n.  灰色动物（如：灰鲸，黑头鸦，斑背潜鸭等）

英英释义

noun

• a sandpiper that breeds in the Arctic and winters in the southern hemisphere
  Synonym:knotgreybackCalidris canutus
• a dowitcher with a grey back
  Synonym:greybackLimnodromus griseus