Helm's Stag Beetle vs Sart's Ground Longhorn
Side-by-side species comparison
| Attribute | Helm's Stag Beetle | Sart's Ground Longhorn |
|---|---|---|
| Scientific Name | Geodorcus helmsi | Dorcadion sartum |
| Order | Coleoptera | Coleoptera |
| Family | Lucanidae | Cerambycidae |
| Size | 25-40 mm | 12-18 mm |
| Habitat | Forests | Grasslands |
| Diet | Wood Feeders | Herbivores |
| Regions | Oceania (New Zealand - South Island) | Kazakhstan, Uzbekistan, Kyrgyzstan |
| Conservation | Near Threatened | Least Concern |
Helm's Stag Beetle
An endemic New Zealand stag beetle found in the forests of the South Island. Males have enlarged mandibles used in fighting. It is a large, flightless beetle that lives in rotting logs in native bush. Several Geodorcus species are found only in New Zealand.
Did You Know?
New Zealand stag beetles are flightless, having lost their ability to fly in the absence of land mammal predators over millions of years of island evolution.
Sart's Ground Longhorn
A flightless ground-dwelling cerambycid from the steppes of Central Asia. Its elytra are fused and covered in dense brown pubescence with pale lateral stripes. Adults walk on the ground among grasses and low vegetation.
Did You Know?
Being flightless, Dorcadion species have extremely localized populations, with many endemic to single mountain valleys.