Gray-bellied Wren-Babbler

Distinctive-looking small bird found in riverside or lakeside vegetation such as reeds; generally avoids the densest stands. Buffy-brown overall with a dark head; Central Asian birds average paler than Iranian birds. Sexes are similar, but females are lighter-colored and less contrastingly marked. The ‘caspia’ form of Eurasian Penduline-Tit can be similar, but Black-headed has an entirely dark head instead of a dark mask. Like other penduline-tits, builds a hanging pouch nest, which in this species is typically woven between reeds.

A sleek, medium-large, gregarious species of woodlands that sometimes ventures into agricultural and urban areas. Its overall green plumage, long, pointed tail, and stout bill eliminate all other species in range. In overflight, it often appears green with a red slash on each forewing. Most common call is a series of squeaks that takes on a twittering quality when given by an excited flock.

Brightly plumaged yellowthroat, restricted to northeast Mexico. Favors reed beds and adjacent marshy vegetation around lakes and ponds, also locally in cane fields. Common Yellowthroat is a common migrant throughout range of Altamira and is usually more numerous. Altamira is brighter yellow overall than Common. Male has yellowish border to black mask and extensively yellow underparts. Female is brighter and more extensively yellow on face and underparts than Common, but can be difficult to distinguish.