It’s easy to see why these lizards are often referred to as the Spiderman lizard. The more common common name is the red-headed agama lizard, also known as the red-headed rock agama. This one was taking in the sun atop a rock in the Masai Mara of Kenya.
Nikon D300 with Nikkor 200-400mm lens (at 400mm) ISO 400, f/8 at 1/400th of a second