Good up-close and personal shots of the lizards. The first appears to be a bit green overall, and maybe also a little yellow (at least on my monitor here at work). The black and white looks like it's either a little oversharpened or just a little too high in contrast. On all three, I would do a bit of cropping to get rid of bright background objects or out-of-focus areas that don't help the image. The frog has some overexposed highlights on the frog and in the background.