Head to head
American Water Shrew vs Eurasian Water Shrew
The American water shrew and Eurasian water shrew are both semi-aquatic insectivores adapted to hunting in and around streams, but each evolved a different specialised trick for survival.
| American Water Shrew | Eurasian Water Shrew | |
|---|---|---|
| Scientific name | Sorex palustris | Neomys fodiens |
| Signature adaptation | Can briefly run across water | Venomous bite |
| Native range | Canada and northern United States | Europe and parts of Asia |
| Prey-handling advantage | Speed and buoyancy | Venom subdues larger prey |
| Fur adaptation | Waterproof, traps air | Dense, water-resistant |
| Conservation status | Least Concern | Least Concern |
| Population trend | Stable | Stable |
| Habitat | Wetlands, forest | Wetlands, forest |
American Water Shrew vs Eurasian Water Shrew: common questions
Which water shrew is venomous, the American or the Eurasian?
The Eurasian water shrew is venomous, one of the very few venomous mammals alive, delivering a mild toxin through its bite that can help subdue prey larger than itself, while the American water shrew instead relies on speed and its ability to briefly run across water rather than venom.
How does the American water shrew run across water?
This species can briefly run across the surface of water, with air bubbles trapped by fringes of stiff hair on its feet providing just enough buoyancy to prevent it from sinking for a few crucial seconds, an ability not documented in the venom-reliant Eurasian water shrew.
Do both water shrews live in similar habitat?
Yes, both species are semi-aquatic insectivores adapted to hunting in and around streams and wetlands, sharing dense waterproof fur and fringed feet for swimming, though the American water shrew is native to North America while the Eurasian water shrew occupies Europe and parts of Asia.