During the fight between the bullman and the tiger, the animal actually took the stuntman's head in his jaws. Luckily he was wearing a fiberglass helmet which protected him.
The actors playing the humanimals had to report to make-up at 3:00 am to be ready for their scenes.
Dr. Moreau's creations were called humanimals.
Michael York turned down the role of Andrew Braddock several times before finally agreeing to do it.
Two of the black leopards mated on-location, and the female gave birth during production.