Many harmless snakes are misidentified as venomous and thus persecuted.  Of the 3000 or so species on our planet, only approximately 600 are venomous (and a far smaller number of those actually dangerous).  Nonvenomous snakes include colubrids, strong slender snakes which use constriction (gopher, milk, and kingsnakes), boas/pythons, garter snakes, and many others.  The former category is most-heavily represented in this album.