When Dr Brady Barr decided to dress up as a crocodile, the disguise needed to be good.
Otherwise he was in grave danger of being eaten by the real thing.
The zoologist adopted his bizarre outfit in the hope of getting closer to a colony of Nile crocodiles, which can grow up to 20ft.
His disguise was a prosthetic head attached to the front of a protective metal cage covered with canvas and a generous plastering of hippo dung to mask his human scent.
It was 13ft long - average Nile size. The head was made of glass fibre, while the frame of the body was aluminium covered with a sheet of Kevlar body armour.
Thus protected, he crawled on his hands and knees up to the fearsome reptiles, close enough to touch them.
With more photos.