The wattled ploughbill (Eulacestoma nigropectus) is a small bird from New Guinea. It is the only member of the monotypic genus Eulacestoma and family Eulacestomatidae. It is also known as the wattled shrike-tit or ploughshare tit.
It is approximately 12.5 to 14 cm, olive-brown songbird with a strong, thick, wedge-shaped black bill. It weighs 19–22 g. The sexes are different. The male has black underparts, an almost golden forehead, black wings with golden scapulars, and a pair of large circular pink wattles on the cheek. The female has olive green plumage and pale olive below. Only the adult male has wattles.