Pink-headed Imperial-Pigeon

Poorly known Peruvian endemic found only in high Andean cloud forest northeast of the city of Huancayo. It was described to science in 2013. Adult male is plain gray, lacking the rufous barring on the lower underparts shown by Rufous-vented Tapaculo and Trilling Tapaculo. Female plumage not yet known with certainty. Younger birds are heavily marked with bars or scales. Best identified by range and voice. Typical song is a lengthy series that starts out with simple notes and gradually transitions into sputtering bursts.

Very small, finchlike bird of grassy and weedy areas in tropical lowlands, especially in marshy areas. Often in flocks, mixing readily with slightly larger White-collared Seedeater. Breeding male (only in spring–summer) is striking: slaty bluish above and rusty below with a rusty rump. Nonbreeding male, female, and immature are much plainer: buffy brown overall, paler below, with distinct paler wing edgings (unlike plain-winged White-collared Seedeaters in west Mexico), and distinct orangey tones to the bill (bill dusky on White-collared).

Striking brown-and-white petrel of Antarctica and its adjacent seas and islands. Essentially unmistakable, but worth comparing with Cape Petrel if seen at great distance. Breeds on rocky slopes and cliff faces, both coastal and inland; one of very few flying birds likely to be seen any distance inland in Antarctica. When not breeding, disperses north, sometimes getting as far as the Falklands. Often seen in huge numbers around foraging cetaceans or fishing vessels.