[wulf]

I think the first image works better for showing the chameleon integrated with its environment and the second makes it stand it out better; it is down to the contrast between the colours of the creature and the backdrop.

However, in both pictures, a crop to a wider format would be advantageous, both to avoid the large block of blurred foreground and also to stop the foreground / background division being set so near the mid-point of the image. Aim for putting the "line" about 1/3 of the way up from the bottom as a starting point.

Wulf