We have a lot of pipes laying in our yard at work and early one morning they came running to tell me they had found a snake in one of them. This one was about 18-20 inches long. It is a Rhombic Egg-eater (Dasypeltis scabra).
Although they have vivid markings and confused with venomous snakes, these are harmless and feed exclusively on birds eggs. They have a very flexible jaw which can stretch over the egg and then passes through the throat into the neck region. There is is crushed by a series on bony protrusions so that it collapses and the contents swallowed. The shell is then regurgitated as a neat package. 
When threatened, it curls itself up into a u-shaped in order to rub its scales against each other, making a fearsome rasping sound in order to seem more dangerous.
Although they have vivid markings and confused with venomous snakes, these are harmless and feed exclusively on birds eggs. They have a very flexible jaw which can stretch over the egg and then passes through the throat into the neck region. There is is crushed by a series on bony protrusions so that it collapses and the contents swallowed. The shell is then regurgitated as a neat package. 
When threatened, it curls itself up into a u-shaped in order to rub its scales against each other, making a fearsome rasping sound in order to seem more dangerous.
