Antillean piculet throat and belly is off-white with streaks and spots. The female is similar to the male, except larger and lacking the red spot on the forecrown. The plumage of juvenile birds is similar to the adults but duller. Unlike the true woodpeckers (Picinae), they do not drum on trees to advertise their ownership of a territory, instead calling in a loud and rapid whistle. This call, rendered as "kuk-kikikikekukuk", is also used as a contact call between pairs. The Antillean piculet feeds on insects, with ants and beetles forming a large part of the diet. They also consume a lot
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