Mountain Ash Sawfly vs Japanese Ice Crawler
Side-by-side species comparison
| Attribute | Mountain Ash Sawfly | Japanese Ice Crawler |
|---|---|---|
| Scientific Name | Pristiphora geniculata | Galloisiana nipponensis |
| Order | Hymenoptera | Grylloblattodea |
| Family | Tenthredinidae | Grylloblattidae |
| Size | 5-7 mm | 20-25 mm |
| Habitat | Mountains | Mountains |
| Diet | Herbivores | Detritivores |
| Regions | Europe, introduced to North America | Asia |
| Conservation | Least Concern | Vulnerable |
Mountain Ash Sawfly
A small blackish sawfly with pale legs whose green larvae can completely defoliate mountain ash (rowan) trees. Larvae have dark heads and feed gregariously.
Did You Know?
Introduced to North America in the early 1900s, it quickly became the most damaging pest of ornamental mountain ash trees across the continent.
Japanese Ice Crawler
A nocturnal wingless insect found at high elevations in Japan. One of the most primitive living insects, often called a living fossil from the Permian period.
Did You Know?
Ice crawlers are considered living fossils — their order dates back to the Permian period, 250 million years ago, before the dinosaurs evolved.