Trogonoptera brookiana, Rajah Brooke's birdwing, is a birdwing butterfly from the rainforests of the Thai-Malay Peninsula, Borneo, Natuna, Sumatra, and various small islands west of Sumatra (Banyak, Simeulue, Batu and Mentawai).

[4][5] The butterfly was named by the naturalist Alfred Russel Wallace in 1855, after James Brooke, the Rajah of Sarawak.

[6] Adults sip flower nectar from plants such as Bauhinia.

[5] Rajah Brooke's birdwing is a protected species, listed under Appendix II of CITES,[6][7] meaning that international export is restricted to those who have been granted a permit.

The wings of females are browner with prominent white flashes at the tips of the forewings and at the base of the hindwings.