The adult male's winter plumage is similar to the female's, but the wings and tail remain darker.

Since these are nearly always in winter plumage they are presumably immature.

This is particularly the case in winter plumage, when both species are plain gray.

The drabber winter plumage is basically brown above and white below.

"They are in their full winter plumage now," Pekka said.

But the Colonel could see the beautiful winter plumage on his breast and wings.

In winter plumage, their bills are smaller and dull yellow.

They are much paler in winter plumage, mottled above and white below.

Females look generally like washed-out versions of males in winter plumage.

In winter plumage, this species is pale gray above.