Yellow-spotted Bush Sparrow

Dull, relatively unmarked olive-brown warbler with a prominent yellowish-white eyestripe, faint wingbars, and pale whitish underparts. Visually inseparable from Japanese and Kamchatka Leaf Warblers; listen for song, an electric chattery trill. Also gives a metallic two-noted call and a short harsh buzz. Breeds in shrubby areas, often near water, throughout the Eurasian taiga. Breeding range extends to Alaska, where it is the only leaf warbler. Winters in lowland and foothill forest, forest edge, and gardens, primarily in Southeast Asia.

Small, finchlike bird of weedy and grassy areas in tropical lowlands. Often in small flocks, which associate readily with seedeaters and grassquits. ​Adult is handsome and striking with rusty upperparts. Black head and underparts are cut by a broad white swath from flanks across the lower breast. Note stout gray bill. Juvenile notably plain, buffy brown overall with stout bluish-gray bill. Note the pointed tail, unlike seedeaters and grassquits. Native to Asia and spreading in New World as an escaped cage bird.

This gorgeous medium-sized heron is uncommon but widespread in lowlands of South America, barely extending into eastern Panama. Not likely to be mistaken: combination of silvery back, buffy neck and belly, black cap, and blue lores (sometimes radiant turquoise!) help distinguish this species from other herons. Also note the long white plumes on the back of the head. Occurs around swamps, forested ponds, and rivers, usually singly.