Both sexes resemble the more restricted relative, the Palawan birdwing, but males of Rajah Brooke's birdwing have more green to the hindwings. The wingspan of Rajah Brooke's birdwing is .Butterfly Corner. Trogonoptera brookiana (Raja Brooke's Birdwing). Accessed 20 May 2012 The wings of males are mainly black. Each forewing has seven tooth-shaped electric-green markings, while there is a relatively large electric-green patch on the hindwings. The head is bright red and the body is black with red markings. The wings of females are browner with prominent white flashes at the tips of the forewings and at the base of the hindwings.
