The species in the photograph (plate 32, repeated here as plate 74) is clearly a wader, and its general shape and coloration shows that it is either a Calidris or a Tringa sandpiper. The lack of patterning and its dull colour tells us that it is in winter plumage. Bills are, of course, of considerable importance in wader identification, but, as this bird's bill is completely obscured, its legs are

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