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
Varzea piculet is unlikely to be confused with any other piculet because it is the only species in its range with dark underparts. The varzea piculet is endemic to Brazil in tropical South America where it has a rather limited range. It lives along the Amazon River in a wildlife corridor, in the forest called "várzea forest", a freshwater swamp forest. It ranges from the confluence of the Amazon River with the Rio Negro in a , variable-width corridor downstream for about to the confluence of the Trombetas River from the north. The confluence of the Tapajós River joins here from the