White-backed Black-Tit

Medium-sized sunbird with a long, thin, well-curved bill. Males have bronze-and-green iridescence, though they look black in most light. There is an odd all-green subspecies in Angola, but it does not overlap in range with Malachite or Scarlet-tufted Sunbirds. The female has a pale eyebrow and pale yellowish underparts with fine streaking. Found in montane habitats including forest, grassland, woodland, and gardens. Vocalizations include a jumble of twittering notes and cleaner whistles. Male similar to male Tacazze Sunbird, but lacks any purple tones to the plumage. Female Bronze Sunbird separated from female Tacazze and Malachite Sunbirds by paler underparts with fine streaks.

Rare vireo found only in lush Andean cloud forest in northwestern Ecuador and western Colombia. In contrast to the much more common Brown-capped Vireo, it has pale wingbars and may show an ochraceous wash on the throat and breast. Often accompanies mixed-species flocks high in the canopy, where it can be hard to see well. Song is a quick series of sweet-sounding notes that vary in pitch unpredictably.

Handsome, rather large jay. Common in tropical forest and woodland of northwest Mexico where it is endemic. Usually in small groups, which can be noisy and conspicuous or very quiet and easily overlooked. Deep purplish-blue back, wings, and tail do not contrast strongly with black head and body (can look blackish overall at a distance). Note piercing pale eyes and bright yellow legs and feet. Like other related jays, immature has yellow bill and dull eyes. Compare with San Blas Jay (both occur around town of San Blas, Nayarit, where, ironically, Purplish-backed is generally the only species found in town).