Giant Congo Snake

From: http://www.cryptozoology.fsbusiness.co.uk/topics/giantcongosnake/index.html

A Belgian chopper pilot called Remy Van Lierde took the photo (pictured left) during a patrol over the Republic of Congo in 1959. The snake he witnessed has been estimated to be anywhere from around 40-50 feet long. It was possible to estimate the size of the snake because of the many features on the ground in the images taken.
It was described by the pilot as a dark shade of brown and green with a white coloured belly. The jaws were of triangular shape. The pilot claimed the head was a massive 3 feet wide adding that as he cautiously moved in lower for a closer inspection the snake raised itself in the air as high as maybe 10 feet, looking like it may attack the helicopter.

After much expert analysis the images taken of this 'Giant Congo Snake' were deemed to be genuine.