 By building dams and digging channels, beavers create wetlands that support moist vegetation. This water can prevent the land from drying out during a drought and stifle any wildfires that try to burn through. The beaver wetland comes into view and it's a completely different situation. It's suddenly very loud. You hear birds calling. You hear amphibians calling. You hear the fish jumping and the water splashing. You hear the beavers grumbling and chatting with one another. And everything's green and everything's lush.