waiting and waiting in a canoe all day with this trap and camera trap and putting out snails, snails escape. by the end of the day you go look and you had no snails. >> the snails escaped. >> they're faster than they look. then finally on the last day, you know, they just came one after another, boom, boom, boom. and it was awesome. bill, it was like the best thing. and i was celebrating all by myself. you know, like yelling in the canoe. >> lack of clean water is just one threat to the glades, though. like most wild places in the age of man, another big struggle involves protecting native species like the snail kite or the wood stork from destructive exotic species like the burmese python. and where did they come from, do they think? >> a lot of them were imported in. >> bill booth is a fireman, outdoorsman and part-time python hunter. >> people want them as an exotic pet. they got to have a python. they either get tired of them or