Heh, have you ever worked with them to any extent? Garter snakes are very inquisitive and smart snakes. They pick up on habits and routine very very quickly and seem to have more of a 'problem solving' aptitude than most species of snakes I have worked with(which is a bunch).
:You must own some genius garter snakes....From my experience with garter's...they are some of the dumbest snakes I have ever caught in my life. I really don't see how some of them survive :CCD