Hundreds of people are taking part in a month-long "Python Challenge" in the Florida Everglades, hunting for Burmese pythons.
While the species is not venomous, the snakes are strong and deadly, and can also threaten the ecosystem, reports CBS News correspondent Mark Strassmann.
In the Florida Everglades, it is "basking season" for Burmese pythons when the cold-blooded snakes seek out the warmth of the sun.
Tom Rahill's team is hunting for these snakes. Burmese pythons are not a venomous, but they are an invasive species - and an evasive one.
"It is a challenge. And we'll go multiple days and not see anything," said Tom Aycock, a member of Rahill's team.
Burmese pythons average about eight feet and camouflage themselves in more than one million acres of swamp and sawgrass. But Rahill is known as the "snake whisperer."
"I've supervised hundreds and hundreds of captures and over 300 captured personally," Rahill said.
Rahill tracked down his first Burmese in 2008 and was hooked.
"You go into an alpha predator mindset. If you don't have an alpha predator mindset, some people can get hurt easily," Rahill said.
First, they bite.
"They have sharp, hundreds of sharp, razor teeth. You have to just breathe deep and just let it release on its own," Rahill said. "If you pull away from a python that bites you, your arm is going to be shredded."
Big Burmese can also coil and crush you.
"I had a hold of a 17-foot python a number of years back. Totally ecstatic... I had a hold of it and it moved me like I was a feather on a freight train," Rahill said.
A big Burmese can even swallow a deer. As captured in one photo, an alligator inside the python's stomach was so big, the snake actually exploded.
Like the population of these snakes in the Everglades, a female can lay up to 100 eggs.
"There could be tens of thousands to hundreds of thousands of snakes. We just don't know," said Kristen Penny Sommers who works for the Florida Conservation Commission.
Some experts believe pet owners released their Burmese into the wild when the snakes grew too big.
"Burmese pythons don't have any natural predators in the state of Florida," Sommers said. "They're not supposed to be here."
For help removing them, Florida's Fish and Wildlife Officials started the "Python Challenge," with a top prize of $5,000.
Rahill's competing with his team of volunteers called the "Swamp Apes." They invite combat vets with PTSD on the hunt for what he calls "wilderness therapy."
These hunters grab a Burmese by the neck, behind the jaw and let it wear itself out, then drop it into a bag. They can deliver it dead or alive to wildlife officials.
Rahill's "Swamp Apes" will be featured on an upcoming "Animal Planet" that focuses on the Python Challenge and hunters who play hide-and-seek with the killer snakes.