Around a beaver pond, we sometimes catch a whiff of beaver odor. People have described it to me as smoky, woody, or like tobacco. It may waft over from the lodge, or it might emanate from scent mounds – little piles of mud by the water’s edge. Beavers make scent mounds by dredging up mud from the bottom of a pond, then carrying it up on land in their front paws while walking upright. The beaver drops the mud, then squats over the mound and applies castoreum from glands near the base of the tail.
The smell means: keep away! In some neighborhoods, this territorial advertisement works remarkably well. I’ve been involved in studies where human-made scent mounds effectively deterred free-ranging beavers from settling in unoccupied beaver habitat. » Continue Reading.