Question Author
Hi Chipchopper. I've found some images for sand boas and nothing quite matches. The nearest is the Spotted Sand Boa (jaculus) not tataricius, the background is far too lght-coloured and the diamond patterning has big splodgy ones on the back. The one I saw was really quite a dull, darkish-muddy background (hard to see against the soil) and the little, darker (almost black) diamond shapes were neat and regular all over its body, including the back, where they were a bit bigger. Besides, habitat given is Mediterranean & I'm not far from Poitiers! Learning a lot about an unknown topic here, all very interesting.