Black-winged Snowfinch

Medium-sized antpitta found in elfin forest and páramo near or above treeline in the Andes in north-central Colombia. Typical antpitta shape: plump with short tail and long legs. Dull brownish plumage, darker olive above and richer buffy below. Sexes similar. Fairly common and much more conspicuous than most other antpittas; frequently seen bounding around in the open, though typically close to shrubby cover. Sometimes sings from a fairly prominent perch; listen for series of four to six clipped, piping whistles: usually two higher, longer notes followed by a slightly quicker series of shorter rising notes.

Small, compact swallow with dark (glossy dark blue) upperparts, smudgy gray cast on whitish underparts, and bright white rump. Very similar to Northern and Nepal House-Martins, with gray-smudged underparts intermediate between the clean white belly of the former and black sides of the latter. Sometimes mistaken for House Swift when seen from above, but the chunkier shape and broader wings of the swallow are distinctive. Often nests in bustling colonies on cliffs and under the eaves of human-made structures.

Elegant seabird with extremely long wings and forked tail. Adults are pale gray with white cheek, black cap, and red bill and legs. Very similar to Common Tern; note shorter bill, shorter legs, gray belly, and paler gray wingtips with very limited dark tips. Young birds show partial black cap and black bill and legs; look for pale gray wingtips and stubbier legs to separate from Common Tern. Rarely seen away from breeding grounds on coastal islands or small ponds in the Arctic tundra. Migrates offshore, heading for wintering grounds in Southern Hemisphere.