Philothamnus semivariegatus, commonly known as the spotted bush snake is a species of non-venomous colubrid snake, endemic to Africa. P. semivariegatus is distributed from South Africa northward to Sudan,Uganda and from Guinea eastward to Tanzania.
Spotted bush snakes are mostly found in trees in bush and forest areas, where they hunt lizards and treefrogs. They are excellent climbers and swimmers, have very good eyesight, and are highly alert snakes. They are not territorial, and will roam great distances in search for food. Spotted bush snakes are very common and completely harmless. They are well camouflaged, naturally very nervous, and quick to escape from any potential threat.
Source : Wikipedia