Polar Willow Gall Sawfly vs Greenland Ground Beetle
Side-by-side species comparison
| Attribute | Polar Willow Gall Sawfly | Greenland Ground Beetle |
|---|---|---|
| Scientific Name | Euura arcticum | Patrobus septentrionis |
| Order | Hymenoptera | Coleoptera |
| Family | Tenthredinidae | Carabidae |
| Size | 3-5 mm | 8-11 mm |
| Habitat | Tundra & Arctic | Tundra & Arctic |
| Diet | Gall Makers | Predators |
| Regions | Arctic Canada, Alaska, Greenland, Arctic Scandinavia, Svalbard | Scandinavia, Finland, northern Russia, Greenland, Arctic Canada |
| Conservation | Least Concern | Least Concern |
Polar Willow Gall Sawfly
A tiny sawfly that induces galls on Arctic willow stems by injecting chemicals during egg-laying. The larva develops safely inside the swollen plant tissue. Adults are small and dark with clear wings.
Did You Know?
The gall provides the larva with both food and insulation, maintaining temperatures several degrees warmer than the outside air.
Greenland Ground Beetle
A dark brown to black ground beetle with long legs and a narrowly oval body. It is common under stones and moss in damp habitats across the subarctic. Adults are fast-running nocturnal predators.
Did You Know?
Despite its common name, this beetle is one of only a handful of beetle species that can survive in Greenland's harsh climate.