Found these two going at it right out in the open. They are New Mexico Whiptail lizards and they’re the official State of New Mexico reptile. They’re parthenogenic; that is… there are only females and they don’t require males to reproduce. So females mate with other females, the natural kingdom’s version of gay sex (they are nicknamed “lesbian lizards”). There’s also biting involved judging from the photo.
Whiptails will burrow and lay up to 4 eggs that hatch in 8 weeks or so. They can run like the wind and get up on their back to legs for maximum speed. There’s an abundance of these gals around and I’m always dodging them when I’m walking or riding my bike.