If not thousands. They are not the common brown garden snail but a little white snail about quarter the size of the brown snail. The type that you often see on fence posts. But don't let their size fool you into a false sense of security. They maybe small but they eat a lot. I have to mulch heavily because of the sandy soil so I am giving the little buggers a prefect hiding place. They eat anything that is nice, eg vegies, fruit trees, basically anything that I like and am watering. Would love to have ducks but at the moment that isn't a goer. Any suggestions? Also much as I don't like it at the moment i am using snail bait. Does anyone know how bad it is for the environment and anyways of decreasing its "badness".