Large Prey of a Python

A Southern African Rock Python ( Python natalensis) with it's prey.
This is probably as large as a prey could be for a Southern African Rock Python - a female Nyala Buck.
(photo was sent to me from an unknown source)
After eating a meal like this, the Python may fast for three months without eating again.
I personally have seen a large Female Southern African Rock Python after it had eaten a female Impala buck. It looked as though it could not move. I had been taken to see this Python which had been tracked over a period of 1 year by a Wits University student. To the best of his knowledge, this female Python had not eaten for three months and had just emerged from a hole where it had been with it's eggs for two months and previous to that it had not eaten whilst gravid with eggs.