Deep in the Florida Everglades, a team of snake hunters spent hours searching for one of the swamp's most elusive predators. Just when it seemed like another slow day, a trained dog picked up a scent.

The largest of the four female pythons captured on the island was around 15 feet in length and she was still full of eggs, according to Mike Kimmel, known as the Python Cowboy. Screengrab from Python ...