The scientists studied three adult female Burmese pythons. As one of those snakes was ingesting a 77-pound white-tailed deer, they discovered the deer was 66.9% of the snake’s mass.

WATCH: Burmese python swallows 77-pound white-tailed deer Florida’s invasive snakes can eat bigger prey than scientists previously realized, a study in Journal of Reptiles & Amphibians concluded.