The lighting makes it difficult, but jugding from the body shape/scales and environment, they seem to be a subspecies of red-headed agama. I think the Latin name is Agama agama, but I'm not quite sure. The species any way is widespread in eastern Africa -- a savanna, but not desert animal. Please undertand that I am not positive, but either way the care will be as such -- give them plenty of rocks (fake or real) to bask on and try to seperate different size speciemens. They may be cannibalistic.

By the way, the species is extremely variable, and the head won't always be red.