Nice attempt. You could have moved to the right and a bit higher to get a better angle. There is a lot of space at the top, which could have accommodated more of the lizard/rock. The light seems to be coming from your right. For subjects like this, it is not easy to get the right angle in one attempt. You need to judge the angle of light and expect where the lizard will emerge, and position yourself accordingly.
Nice pose, adequate depth of field and nice smooth background.
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