Once extinct in Britain, beavers are now returning to rivers and wetlands across the country, quietly reshaping landscapes as they go. These natural engineers leave behind clear evidence of their presence, if you know what to look for.
Whether you're walking along a stream or exploring a wooded area, spotting the signs of beaver activity can be a rewarding way to connect with local wildlife. Here's how to identify the clues.
The clues that reveal a beaver’s presence
Chewed trees
Distinctive pencil-shaped stumps (top image) with 3 to 4mm-wide toothmarks are one of the most iconic signs of beaver activity. Mature trees are felled to create the bases of dams, while younger trees are felled for food.
Presence of dams
Dams are constructed out of mud, stones, logs and branches. They maintain a constant water level around the lodge for protection against predators and increase the space available for foraging.
Stripped bark
The beaver’s primary food source is tree bark, which is effortlessly stripped off both felled and standing trees using its large, curved incisors. This is often done in characteristic rings, a behaviour known as girdling.
Canals
Narrow channels known as "beaver canals" are cut into the riverbank to connect several different areas of beaver activity. They are often used to transport food and building materials to the dam or lodge.
Top image credit: Getty Images