The Black-rumped FlamebackDinopium benghalense, also known as the Lesser Golden-backed Woodpecker or Lesser Goldenback, is a woodpecker found widely distributed in the Indian Subcontinent. It is one of the few woodpeckers that are seen in urban areas. It has a characteristic rattling-whinnying call and an undulating flight. It is the only golden-backed woodpecker with a black throat and black rump.
The Black-rumped Flameback is a large species at 26–29 cm in length. It has a typical woodpecker shape, and the golden yellow wing coverts are distinctive. The rump is black and not red as in the Greater Flameback. The underparts are white with dark chevron markings. The black throat finely marked with white immediately separates it from other golden backed woodpeckers in the Indian region. The head is whitish with a black nape and throat, and there is a grayish eye patch. Unlike the Greater Flameback it has no dark moustachial stripes.
The adult male has a red crown and crest. Females have a black forecrown spotted with white, with red only on the rear crest. Young birds are like the female, but duller.
The Sri Lankan these woodpeckers go by the generic name of kæralaa in Sinhala. In some parts of the island, it is also called kottoruwa although it more often refers to barbets. This bird appears in a 4.50 rupee Sri Lankan postal stamp. It also appears in a 3.75 Taka postal stamp from Bangladesh.