This astonishing series of photographs shows the men at the Samphran Elephant Ground and Zoo performing what may well be the world's most dangerous job.
The wranglers have been performing the stunts at the zoo on the outskirts of Bangkok, Thailand, since it was set up in 1985.
During the hour-long shows they stick their head between the jaws of some of the zoo's biggest crocs, in the style of Krai Thong, a legendary Thai crocodile hunter.