Belding's Yellowthroat

Tiny, highly endangered hummingbird found very locally in the desert of northern Chile. Favors native desert scrub in lowland valleys, but widely eliminated from most areas by intensive agriculture. Male most often detected by insectlike buzz made by wings in flight. Also perches conspicuously atop bushes and on wires; note diagnostic crossed tail feathers. Female similar to Peruvian Sheartail, but has shorter tail with pale rusty bases to outer feathers (hard to see).

Yellowish warbler found in deciduous dry forests and gallery forests where it forages hyperactively on the ground. Olive-green above and yellow below with orange legs. Note the conspicuous yellow eyebrow. The song is loud and melodious “titzi teetee teetee chiiw chiiw chiiw."

Round-headed diving duck. Males have black breast, medium gray back, white sides, and yellow eye. Head appears black with a greenish sheen in good lighting, never purplish. Females are brown overall, grayer on body in winter, with white patch at base of bill and yellow eye. Very similar to Lesser Scaup; note smoothly rounded head without tall peak, puffier cheeks, more extensive white stripe on wing in flight, and larger, broader bill. Can be similar to immature male and female Tufted Duck, but note smoothly rounded head and more extensive white bill base patch in females. Often in flocks with other Aythya ducks. Tends to prefer saltwater bays and coves, but also found in freshwater.