 The male Vieillot's crested fireback, "L. rufa", of the Thai-Malay Peninsula and most of Sumatra has white central tail feathers, red legs and bluish black streaked white below.The final subspecies, Delacour's crested fireback, "L. i. macartneyi", is found in south-eastern Sumatra and the male has white to the tail, whitish legs and a variable amount of rufous below.As "macartneyi" specimens are variable, the Handbook of Birds of the World regards it as a hybrid between "rufa" and a possible relictual or introduced population of "ignita".