Black-winged Oriole

Brown antwren with reddish tail and wings. Head is gray in both sexes, fading into a warmer brown lower body. Cream wingbars. Slightly longer tailed than similar antwrens and typically forages higher in the midstory. Often joins mixed-species flocks with other antwrens and antshrikes. Listen for its song: a steady series of high, rising “pseet” notes.

Fairly small, warm brown woodcreeper with buffy spots on breast and vague buffy eyebrow. Note relatively short, straight bill. Very similar to many other species of woodcreepers but smaller than most others in range; tail relatively longer than most other woodcreepers but this is of limited use in field identification. Focus on overall shape, especially the vaguely “pin-headed” look and scruffy feathers on the nape. Generally found in primary forest, usually following a mixed-species flock. Best identified by voice, though not a particularly vocal species. Song is a series of very long, clear slightly rising whistled notes, each note a bit lower-pitched than the one before. Sometimes has brief stutters at the beginning or end of each note.

A light gray medium-sized tern. Black cap extends to bill in breeding plumage. Bill and legs red. In non-breeding birds, cap reduced to just the area behind the eye, bill has dull pinkish color, and underparts are white. Breeds in the circumpolar subantarctic region. Generally known to stay close to their breeding sites. Migrating Arctic Tern could occur in the same area, but not in breeding plumage, and would show more prominent black markings on outer primaries. White-fronted Tern can be distinguished by its larger body, lighter coloring, and longer, thinner, all-black bill.