Plain-breasted piculet 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 grey color with slight pale barring and a light yellowish-brown,
Speckle-chested piculet markings. The flanks and the rest of the underparts are barred in black and white. The tail is blackish apart from the central two feathers and a bar near the tip which are white. The front of the crown in males is red while in females it is black. The speckle-chested piculet is endemic to Peru. It has a rather limited range, being only known from the central Huallaga Valley and certain parts of the Utcubamba Valley in the foothills of the eastern Andes in Peru. Its altitudinal range is between about . Its main habitat is primary moist lowland