Python hunter Donna Kalil estimates she's caught nearly 270 of the invasive snakes that have been decimating small mammal populations and wreaking havoc on the Everglades ecosystem. "I'm out here in the environment that I love, that I grew up in, that I saw rabbits, and raccoons, and opossums, and all of my native snakes and reptiles. I enjoy being out here, and I believe that I'm making a difference."