Click here for information at USGS!
Click here for a quick guide for this species. PDF format!
- Brown body up to 4 in (10.2 cm) long
- Dark, rusty spots on each side of carapace
- Large, black-tipped claws
- Lakes, ponds, streams
- Clay, silt, sand, gravel, or rock bottom areas
- Prefer areas with rocks, logs, or other debris as cover
- Can live in both fast- and slow-moving areas of streams
Known Distribution in the Northeast
- Maine, Massachusetts, New York, Vermont
- Native range: Indiana, Ohio, Kentucky, Michigan
- Severely reduce cover of aquatic plants, eliminating habitat for invertebrates, food for fish and ducks, shelter for young fish, nesting substrate for fish, and erosion control
- Reduce native crayfish populations by competing for food and daytime hiding locations