American Needlefly vs Japanese Ice Crawler
Side-by-side species comparison
| Attribute | American Needlefly | Japanese Ice Crawler |
|---|---|---|
| Scientific Name | Leuctra tenuis | Galloisiana nipponensis |
| Order | Plecoptera | Grylloblattodea |
| Family | Leuctridae | Grylloblattidae |
| Size | 5-8 mm | 20-25 mm |
| Habitat | Rivers & Streams | Mountains |
| Diet | Detritivores | Detritivores |
| Regions | North America | Asia |
| Conservation | Least Concern | Vulnerable |
American Needlefly
A delicate needle-thin stonefly of Appalachian headwater streams. Nymphs are important processors of autumn-shed leaf litter.
Did You Know?
Multiple Leuctra species can coexist in the same stream by emerging at different times of year.
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.