University of Florida researchers documented a surprising new threat to Burmese python eggs in the Everglades, adding to growing evidence that native wildlife is fighting back against the invasive species.

Hunters working across the Florida Everglades removed a record four tons of invasive Burmese pythons in a single coordinated effort, a haul that reflects both the staggering scale of the infestation and the expanding reach of state and federal removal programs.

Native animals can still sometimes gain the upper hand against invasive species.

On July 10, hundreds of professional and amateur snake hunters entered the annual Florida Python Challenge, a 10-day race to remove as many of the invasive animals as possible from the Everglades. The person who bags the most snakes will earn a $10,