Confidence: I'm as sure as I can be.
Notes: I find that body pattern can vary greatly when sexing adult common lizards. I don't capture and handle lizards unless necessary, so belly colour (orange in males) isn't very useful. I am only comfortable sexing adult common lizards if I get a good look at the base of their tail. If you can see a (penile) bulge then you know it's a male, otherwise a female. The bulge makes the dark sides of the male’s tail very obvious.