mothballs contain either
Para dichlorobenzene
or Napthalene.
My dad used to put them around the yard to
discourage rabbits. We soon found the
grackles picking them up in thier beaks
and rubbing their feathers with them..
possibly to get rid of mites?
i hope the critters (birds) did not
come to any harm from them.
Ha! (music link) while searching i also
found that there is a band called
mothhballs