Elegant Sunbird

Small, confusing leaf warbler with olive-yellow upperparts, yellow brow, double wing bars, and a pale crown stripe. Extremely similar to many other small leaf warblers: Pallas’s Leaf Warbler has a brighter yellow brow stripe, and Chinese Leaf Warbler has an incrementally weaker head pattern and a small hook at the rear end of the black eye stripe. Lemon-rumped Warbler is extremely similar visually but averages paler on the brow stripe and darker on the underparts. Listen for the song, an accelerating series of sharp chips followed by a trill; its calls include a tinkling series of chips. Inhabits mid-altitude forests, usually bushy poplar and birch groves; found at lower altitudes than Chinese Leaf Warbler.

Rather large, blue-and-gray jay of highland pine and pine-oak forest endemic to highlands of central Mexico; occurs in transvolcanic belt from Volcánes de Colima in the west to Volcán Orizaba in the east. Typically travels in wide-ranging flocks of 5–25 birds, mainly at middle to upper levels in trees. Appreciably larger and broader-winged than Woodhouse's Scrub-Jays, with plainer plumage (lacks dark mask, whitish eyebrow, and partial dark collar of Woodhouse's Scrub-Jay). Noisy calls carry well.

Extremely elusive and rarely-seen ground-dweller; listen instead for its haunting whistle. If seen, overall size and chunkiness alone should be sufficient to distinguish this species from other pittas. Male has bright blue wings and a grayish head with a thin black line curving downwards from behind the eye. Female is browner overall, with a blue rump and warm rufous-brown wings. Rare in lowland and foothill forests, particularly in swampy or riparian areas.