October 7, 2016 – Olive-crowned Crescentchest (Melanopareia maximiliani)
These crescentchests are found in Bolivia, Argentina, and Paraguay. Though their diet is not well known, they have been observed foraging on the ground, usually alone or in pairs. Nesting in grasses or low shrubs, they build cups of plant fibers and palm fronds. There are two distinct populations with different song types, which may be separate species.