The adults are known to feed from a variety of different flowers. In the wild they really seem to enjoy Lantana.
The origin of the species Troides is currently unknown. Helena is a formal name from Greek meaning light.
The Common Birdwing is primarily found in tropical jungles but they often venture out and are seen in urban gardens.
In the wild the adults can be found from late March until early December.
The genus Troides contains some of the world’s largest butterflies. In fact the worlds largest butterfly, based on wingspan, is the Queen Alexandra's Birdwing (Troides alexandrae), which can have a wingspan up to 9 inches (230 mm).