Very weird. I have seen this in some of my adult cresteds from time to time. I usually see it when I uncover a sleeping gecko on the lower level or my rack where it is a bit cooler. If I disturb the gecko it usually returns to a more uniform color in a few minutes. I'm not sure if it has to do with temperature or lack of blood flow to those particular areas of the body due to temporary inactivity or both. I will try to take some pics next time I catch one of them like that.
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Derek Moynihan
Fat, Flat Lizard Ranch

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