coypu released into the wild is kept near large cities where people feed them leftovers from the kitchen. strengthening the banks

animal aqua aquatic bank banks beaver boat branches burrow burrowsn can central cities complication coypu coypus domestic embankment europe feed feeding food herbivore introduce introduction invader invasion kept kitchen lake large leather leftover leftovers life marina mooring myocastor nutria park people pier pond rat rats released reserve river rodent rods semiaquatic shipyard shore spiny spring stone stones strengthening them three undermine waste where wicker wild willow