But it unnerved people around the state, which has an alligator population estimated at a million.
But in the same period Florida's alligator population has also doubled, to more than one million.
Still, all signs point to another surge in the alligator population in the next few years.
An alligator trapping program is used to manage the refuge's American alligator population.
It is widely agreed that the alligator population now can sustain itself easily.
But the danger of death or injury is increasing as both the human and alligator populations thrive, state officials said.
In the 1940s and 1950s an intense commerce with alligator skins took place, until the alligator population was depleted.
States begin monitoring their alligator populations to ensure that they would continue to grow.
Most of the alligator population and water life will vanish.
One way to find swamplands is to follow the alligator population.