I'm at work right now and for an unknown reason, there are some pics which I can't visualize from my computer (we work on not very up to date computers to be honest... ) and it's the case for yours in this post so I'm already looking forward to having a look at it later when I'm back home. I still already want to take the opportunity to ask you something I've been told by someone I trust a lot and who knows snakes very well, Michel Ansermet director of the Vivarium of Lausanne:
He told me that it happened to him once that he spotted a big black mamba in the wild. He was with a friend and his friend wanted to go back to their car to take another lens for his camera. His friend made a fast move (or at least faster than he should have done) and the black mamba went to him, almost as if it was defending its territory. Fortunately, nothing happened neither to Michel Ansermet nor to his friend but Michel told me he had to stay still like a tree and asked his friend to move forward with the car in order to have the mamba following it. What do you think about that? Have you ever heard stories of black mambas having a more aggressive behavior than they normally have? Obviously, Michel told me he had seen that only once but he also told me another story about a black mamba which had been run over by a car and threw itself on top of the car in a defensive way (I guess it had thought an elephant had walked on it or something like that).
Last but not least, your country has "emigrated" in mine. Have a look at this: http://www.20min.ch/ro/news/suisse/story/20928245 It's in French but it says that a road worker in the state of Basel in Switzerland has encountered a spitter He was working and during his works, received venom in its eyes. I've read in another paper that they are still looking for the snake and according to the description the worker made of the snake, it could be a Mozambique spitting cobra