The Rusty-necked piculet (Picumnus fuscus), is a species of piculet in the Picidae family. It is found on the Rondônia-Bolivian border. Both males and females are buffy cinnamon, with black crowns. Males have orange streaking on their crowns.
Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical swamps/flooded forest. Its greatest threat is habitat loss.