The brown-headed nuthatch (Sitta pusilla) is frequently observed using a small chip of bark held in its beak as a tool to dig for insects. A small songbird found in pine forests throughout the south-eastern United States, it is about the same size as the pygmy nuthatch – and the two species are the world's smallest nuthatches. It has a brown head, is white below and grey above. Males and females are similar.
