USA - 1940 - Baltimore Oriole .

Stamp of - John James Audubon .

The square on the left corner is the  Baltimore Oriole.

The adult male is orange on the underparts shoulder patch and rump, with some birds appearing a very deep flaming orange and others appearing yellowish-orange. All of the rest of the male's plumage is black. The adult female is yellow-brown on the upper parts with darker wings, and dull orange-yellow on the breast and belly.