What do you call a group of house-eating snails? A swarm of snails? Doesn't swarm imply speed? That doesn't work then, does it? A swaaarrrrrmmmmm of snails? A body of snails? A flock of snails?
According to Ask.com, you call a group of snails an escargatoire, rout or walk. I love escargatoire-so artsy, so avante-garde...I might not mind telling people my house got eaten by a escargatoire of snails. Or is that redundant. Would you just say "My house got eaten by an escargatoire?"
If you are making a science fiction movie about house-eating snails, you might want to use "Walk of snails". Doesn't that have the sound of a cheesy sci-fi horror flick? If, however, your movie is more art house than documentary - then you definitely want to stick with "escargatoire". If you are making a documentary on house-eating snails, it might be best to use "rout of snails", which sounds somewhat technical. Hey, what's the rout of 16? Answer: 4 Snails. Hahaha. I crack myself up.
Okay kids, be careful out there. Don't pick up any hitch-hiking snails.