Jacar also called Jacar, Killer of the Amazon was a film made in 1942 of James Dannaldsons expedition to the Amazon.
Dannaldson worked with jaguars and caymans, whose jaws had been wired shut. He said his only close call came when an anaconda he wrestled got a loop around his neck and almost strangled him before the natives could unwrap it.The companys most primitive adventure occurred on Maraj Island, at the mouth of the Amazon, where they spent four weeks. They ran out of imported food and had to subsist for five days on moldy doughnuts filled with small worms and on chickens which, Dannaldson said, seemed to be 90 per cent vulture. ........
Source: Wikipedia