CLOSE UP TILT DOWN - Swedish birch tree chewed up by a Eurasian beaver

swedish birch tree trunk chewed beaver eurasian beaver european beaver forest woods sweden bark focus on foreground tilt down copyspace copy space environment rodent ecosystem keystone species territorial territory industrious industriousness ecology freshwater ecosystem close up closeup dam lodge ecosystem engineer biodiversity landscape timber canada national animal state animal new york oregon castor fiber castoridae coppicing near extinction brown grass paper birch silver birch shiny birch