It's amazing how hard it is to find a bright yellow snake. They're supposed to be poisonous, but they're real mellow, so you don't need to worry about getting bitten unless you start poking the snake or picking it up.
Vivid Snake Photos Come at a Cost — A Bite From a Black Mamba
Rhinoceros viper (Bitis nasicornis) is a venomous viper species found in the forests of West and Central Africa. A big viper, it is known for its striking color pattern and has a distinctive set of two or three horn-like scales on the end of the nose, the front pair of which may be quite long. Large and stout, it ranges in total length (body + tail) from 72 to 107 cm.