beaver bite marks on a trunk of a tree by lake. damaged wood by a bobber

beaver bobber tree cut fell animal dam bark bitten castor chew chop cutter damage demolition destruction destructor eaten ecosystem environment faller fiber forest forestry log logger logman lumberjack lumberman mammal nature pest saboteur sawdust sawyer teeth timber tooth vermin warning wildlife wood woodcutter wrecker gnawer rodent lake pond water bite marks trunk lake damaged pond bobber gnawed tree beavers felled