An intriguing parasite which invades the eyestalks of some snail species. It then alters the snails behaviour to seek out light, where the infected eyes appear as moving worms which attract, then are eaten by birds, where they mature and lay eggs in the birds rectum, being then passed out to begin the lifecycle again through the snail host.
I'm glad you enjoyed it... I worked quite long and hard on it, trying to find tricks that were suitable and hopefully a bit different, as well as some beautiful treats scattered in the minefield π