Most people's knowledge of geckos doesn't extend much beyond the Cockney-tongued lizard hawking car insurance on TV. I won’t go into the implausibility of these ads, the least of which being that a gecko wouldn’t have a chance to survive Britain’s cold climate long enough to pick up an accent. They do, however, thrive abundantly in warm, tropical climates, and in total compose nearly 15% of all reptile species on Earth. If you're fortunate enough to live in gecko country, you've probably seen them climbing and crawling over just about every surface imaginable, including the ceiling.