I have a young Glass Lizard. I wonder how he compares to Slow Worms. He is underground almost all the time. We see him out hunting a couple times a month. But crickets disappear rapidly! I am reluctant to handle him, because they are very fragile, and I don't want his tail to break. He is very flighty. I had to dig him up a couple days ago to check on him, because there seemed to be an awful smell coming from his tank, but actually it was rotting potatoes in the cupboard underneath him.
I have lots of slugs in my yard. My Eastern Box Turtle loves them- he'll eat 20-30 in one sitting! I put a pile of slugs in a big Tupperware lid, and then put the turtle in with them. You can _hear_ him chomping them down.
Glass Lizards, here in Florida, are pretty common road kill in treed areas with long grass. I've never seen one out and about- we got ours by accidentally digging him up with a bulldozer, in the winter. I'd never seen one before, so we kept him for a while. Every time I think about releasing him, I either see a bunch of them road-killed, or he comes out much more frequently and seems more pet-like.
You Brits aren't too inventive with herp names, are you? Slow Worm, Common Lizard, Smooth Snake...
Nanci