Stridulating Passalid vs Hawaiian Picture-wing Fly (Silvestris)
Side-by-side species comparison
| Attribute | Stridulating Passalid | Hawaiian Picture-wing Fly (Silvestris) |
|---|---|---|
| Scientific Name | Passalus punctatostriatus | Drosophila silvestris |
| Order | Coleoptera | Diptera |
| Family | Passalidae | Drosophilidae |
| Size | 30-42 mm | 4-6 mm |
| Habitat | Woodlands | Forests |
| Diet | Wood Feeders | Wood Feeders |
| Regions | Central America, South America | Oceania (Hawaii - Big Island) |
| Conservation | Least Concern | Endangered |
Stridulating Passalid
A large, shiny black bess beetle with prominently punctate-striate elytra and strong mandibles. It lives in family groups within decaying logs. Known for producing a wide repertoire of stridulatory sounds for communication.
Did You Know?
Adults produce sounds by rubbing specialized ridges on the abdomen against the underside of the wings, creating at least 14 distinct calls.
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.