Darkling Beetle vs Stridulating Passalid
Side-by-side species comparison
| Attribute | Darkling Beetle | Stridulating Passalid |
|---|---|---|
| Scientific Name | Eleodes obscura | Passalus punctatostriatus |
| Order | Coleoptera | Coleoptera |
| Family | Tenebrionidae | Passalidae |
| Size | 20-35 mm | 30-42 mm |
| Habitat | Deserts & Drylands | Woodlands |
| Diet | Detritivores | Wood Feeders |
| Regions | Western North America | Central America, South America |
| Conservation | Least Concern | Least Concern |
Darkling Beetle
A flightless, black desert beetle that raises its abdomen in a headstand posture when threatened. It is well adapted to arid environments.
Did You Know?
It can spray a foul-smelling chemical from its abdomen, earning it the nickname 'stink beetle.'
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.