Plain-breasted piculet has assessed its conservation status as being of "least concern." Plain-breasted piculet The plain-breasted piculet ("Picumnus castelnau") is a species of bird in the woodpecker family. It is found in the Ucayali and Amazon floodplains in eastern Peru. Its natural habitats are subtropical or tropical moist lowland forests and heavily degraded former forest. A small bird with a short tail, the plain-breasted piculet typically grows to a length of . It is mostly grey on the face and its nape and upper neck are finely barred in an olive green color. Its mantle and back are an olive, brown or
Piculet of pronounced morphological similarities, but the two "Picumnus" lineages, despite having diverged long ago, are virtually alike except for head coloration (Fuchs "et al.", 2006). The Antillean piculet ("Nesoctites micromegas") has proven to be a very distinct species evolutionarily between piculets and woodpeckers (Benz "et al.", 2006) and thus is nowadays placed in a subfamily of its own. The arrangement of species in the genera follows del Hoyo "et al." (2002). Genus "Picumnus" Genus "Verreauxia" (sometimes included in "Sasia") Genus "Sasia" Piculet The piculets are a distinctive subfamily, Picumninae, of small woodpeckers which occur mainly in tropical South America, with