Borneo birdwing  (Troides andromache)

Little has been documented on the biology of this species, but there are certain biological characteristics known to be common to most, if not all, birdwing butterflies. After mating, females immediately seek out appropriate host plants on which to lay their eggs, usually on plants of the genera Aristolochia and Pararistolochia (both in the family Aristolochiaceae), on which the caterpillar larvae subsequently feed (6). Once the caterpillars hatch, they voraciously munch through the leaves around them. Feeding upon these plants also serves as a defensive mechanism, as they contain certain chemicals that make the caterpillars toxic and therefore unpalatable to most predators (7). The caterpillars eventually pupate and undergo metamorphosis into adult butterflies, and may even manage to maintain toxic chemicals in their tissues into adulthood (7). Troides birdwings typically pupate on the twigs or stems of plants close to the larval food plant or on the food plant itself (3). Adults of this species feed on nectar of Mussaenda blossom and other flowers (5).