Chaco Sparrow

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.

Ebony head and snowy throat, combined with the hazy mixture of bright orange and black on the back, give this bird a distinctly “tortoiseshell” appearance. Appears larger-headed and slightly shorter-tailed than other sibias. Inhabits foothill and montane forests, where it travels in pairs and flocks through the canopy. Unlike other sibias, frequently clambers around on tree trunks and branches like a nuthatch. Listen for its lovely warbled song and buzzy chattering calls.

This striking Celeus is widespread across the Amazonian lowlands of northern South America, with a disjunct population in southeast Brazil. Overall rufous with a shaggy crest like most other members of the genus. Distinctive and unlikely to be confused. Some variation across the range: most have extensive black markings on upperparts and belly, but largely unmarked in the northeastern part of range. All birds have solid black breast. Sexes are similar, but males have a red mustache. Occurs in mature forest and edges, often detected by its series of loud, strident whistles.