White-barred piculet different sub-populations of this bird on either side of the equator in South America. The northerly population is in Guyana, northwestern French Guiana and northern Brazil. The southern population is in southeastern Brazil, eastern Bolivia, eastern Paraguay and northern Argentina. The white-barred piculet occupies various habitats including wet and dry woodland, forest verges, thickets, gallery forests, wooded savannah, scrub, bamboo clumps, vines, creepers and overgrown parks and gardens at elevations of up to about . It is a resident, sedentary species. The white-barred piculet usually forages singly, but may join small mixed species flocks. It feeds on ants, their larvae
Varzea piculet with white speckles. The upper parts of the body are chocolate-brown, sometimes with an olive tinge, and occasionally slightly barred with black. The tail is deep brown apart from the central pair of feathers, which are whitish, and the two outer pairs of feathers which have a whitish bar near the tip. The underparts are some shade of brown with light barring and streaking in darker brown and white. The iris is brown, the beak is black and the legs and feet are bluish-grey. The juvenile is similar to the female but the underparts are more heavily barred. This piculet