tree felled by beaver. tree trunk with bite marks of beavers. damaged wood

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