The muskrats, minks, martens, and skunks for many years have yielded
an enormous annual return from their furs; the squirrels and rabbits
afford sport and a large supply of excellent flesh for food; the
prairie-dogs and some of the ground-squirrels existing in enormous
numbers have been excessively destructive to crops; and others, like
the porcupine and the armadillo, have attracted particular attention
because of their strange characteristics.