壁虎

bìhǔ - gecko

I learnt this word from John - it was an animal I hadn't learnt. I like the fact that it literally means 'wall tiger'. Chinese is such a poetic language. The sentence below is from JuKuu - it sounds like it's from a story:

那只可怜的小壁虎比尔在当中。
The poor little lizard, Bill, was in the middle.