In reply to pete johnson:
> You're in deep shit if one of these bites you. They are present in the climbing areas around the Anti Atlas.
Cobras are bad news. None of the vipers are likely to kill you, though the experience may well be horrible.
That said, I think saw-scaled or carpet vipers extend into the southern Morocco. They are tiny but aggressive and will tend to square up to you rather than slink off if they feel threatened. Their venom is not fatal with prompt treatment but you'd be gambling your kidney or liver functions. I photographed some captive ones many years ago, they were fairly tame and not particularly reactivate to humans moving around near them. Unfortunately the flash sent them mental, they all jumped then did the rasping scales thing while two of them advanced towards me. I was yanked away from them and the door shut pronto.
Pretty sure puff adders are present in southern Morocco too. A snake charmer in the Djemma el Fnaa draped a weighty snake round my neck from behind, no big deal as I like snakes. However when I lifted it off it was a huge puff adder. The poor thing had doubtless had its fangs removed, but otherwise it was quite mellow and very tame.
I love seeing snakes, but have seen precious few in the wild. A couple of asps in the Alps and Pyrenees, one adder in Scotland and a Viperine snake in Provence.