Here the beavers build secure living quarters — first a simple burrow in the riverbank while the dam is under construction and later an offshore, domed lodge of mud and sticks.
Kõigepealt näevad nad vaeva tammi kallal ning rajavad samal ajal jõekaldasse lihtsa uru, hiljem ehitavad aga kalda peale mudast ja okstest pesakuhila.