The wattled ploughbill (Eulacestoma nigropectus) is a small, approximately 14 cm long, olive-brown songbird with a strong, thick, wedge-shaped black bill, used to plough into dead tree branches, bark and twigs in search for its insects diet. The sexes are different. The male has black underparts, black wings and a large circular pink wattle on the cheek. The female has olive green plumage and pale olive below. Only the adult male has wattles. Widespread throughout its large range, the wattled ploughbill is evaluated as least concern on the IUCN Red List of Threatened Species.