Rajah Naga Stag Beetle vs Hawaiian Picture-wing Fly (Silvestris)
Side-by-side species comparison
| Attribute | Rajah Naga Stag Beetle | Hawaiian Picture-wing Fly (Silvestris) |
|---|---|---|
| Scientific Name | Prosopocoilus astacoides | Drosophila silvestris |
| Order | Coleoptera | Diptera |
| Family | Lucanidae | Drosophilidae |
| Size | 30-70 mm including mandibles | 4-6 mm |
| Habitat | Grasslands | Forests |
| Diet | Wood Feeders | Wood Feeders |
| Regions | Southeast Asia (Thailand, Vietnam, Laos, Myanmar, Malaysia, Indonesia) | Oceania (Hawaii - Big Island) |
| Conservation | Least Concern | Endangered |
Rajah Naga Stag Beetle
A medium-sized stag beetle with reddish-brown elytra and a black head bearing distinctly toothed mandibles. Males display significant size variation with mandible shape changing allometrically.
Did You Know?
Small males have straight, simple mandibles while large males develop elaborate curved and toothed mandibles, a phenomenon called male dimorphism.
Hawaiian Picture-wing Fly (Silvestris)
A Hawaiian picture-wing fly closely related to D. heteroneura but with a normally shaped head. It is found in wet forests on Hawaii Island. This species and D. heteroneura are a classic study system for understanding speciation in progress.
Did You Know?
D. silvestris and D. heteroneura can hybridize in the lab, providing key insights into how new species form through sexual selection.