We have a lot of geckos here in florida some are pretty big up to 6 inches long. Today I noticed a rather large one climbing up the screened lanai? I was alarmed at its size as I had never seen a reptile like that wild in my backyard before. I realized its not a gecko it looks like some kind of monitor lizard but I cant tell what kind maybe one of you will know right away? Another thing I can say is it was extremely fast and then as I got closer he went into a hole in the ground, actually a crevace in the concrete slab and went under the slab.