In article , Larry
Stoter writes

Glow Worms mainly eat snails - strange but true. This is why, so I
understand, that you usually only find glow worms in chalk/limestone
areas because such areas have many more snails because of the greater
availablity of calcium for making shells.

I wish someone would tell my snails they're not meant to be here!

--
Kay Easton

Edward's earthworm page:
http://www.scarboro.demon.co.uk/edward/index.htm