grayback

Noun grayback has 2 senses

• grayback(n = noun.animal) greyback, limnodromus griseus - a dowitcher with a grey back;
is a kind of dowitcher

• grayback(n = noun.animal) calidris canutus, greyback, knot - a sandpiper that breeds in the Arctic and winters in the southern hemisphere;
is a kind of sandpiper
is a member of calidris, genus calidris