Crested hornero Furnarius cristatus

A mostly terrestrial and chunky light brown bird of the north and central Chaco, from central Argentina to Western Paraguay and extreme SE Bolivia. Distinguished from Rufous Hornero by crest, from Lark-like Brushrunner by plain plumage, and from Cachalotes by dull plumage, smaller bill and size, and dark iris. Generally found in woodland, thorn scrub, and adjacent habitats. Builds large, open mud domed nests on exposed branches or power poles.