Good, beaver, best The Eurasian beaver (Castor fiber) is one of the most fascinating of Europe’s native mammals. Its dam-building behaviour makes it a “keystone species”. Beaver-constructed wetlands help to prevent soil erosion and flooding by slowing the flow of water through river catchments. By the same token, they improve water quality in rivers as well as helping to mitigate the effects of drought. They also create a diverse habitat for hundreds of other species,… Read More »Are there beavers in Cantabria?