5, see text The crescentchests are a genus, Melanopareia, of suboscine passerine birds from South America.

Their placement there has been questioned and in 2007 the genus was placed in its own family, Melanopareiidae, by the South American Classification Committee.

[2] Subsequently, the family was accepted by the International Ornithological Congress Bird List and the Clements Checklist.

[5] The crescentchests range in length from 14 to 16 cm (5.5–6.3 in), in weight from 16 to 23 g (0.56–0.81 oz) and have relatively long tails compared to the tapaculos.

The nest of that species is a 15 cm high cup made of vegetable fibres and palm fronds, hidden in grasses or low shrubs close to the ground.