On Sun, 28 Feb 2010 11:52:16 +1100, Trish Brown wrote:

FWIW, our vet told me a humane way to dispatch a reptile is to put it in
the fridge for a while and then, when it's torpid, in the freezer. You
wouldn't do that for a bird or mammal, but it works for reptiles like
damaged lizards or road-victim tortoises. Always make sure you put the
creature into a few plastic bags because moribund reptiles do smell awful!

And don't forget to remove them after or you might have them for dinner!