|A Burmese python (Python molurus bivittatus)|
|Burmese pythons are good swimmers|
Burmese pythons are native to much of Asia including such countries as Thailand, Nepal, Vietnam, and parts of China and India. It's capable of living an a variety of habitats, including in areas that are colder than you might expect. They have become invasive in parts of Florida and Puerto Rico. Though their invasive range is currently not that far-reaching, they have the potential to spread across the entirety of the southern United States from California to Georgia, north to Virginia and Washington. Introduction has been exclusively through the pet trade, with individuals either escaping or being released by owners who no longer want them, often because they have grown too large to handle.
|An alligator fighting with a python|
Attempts to manage the python invasion appear to be mainly focused on education of the public. Permits are required for ownership in Florida, and ownership is heavily regulated in general. Importation is quite difficult. There are also steep fines for releasing a Bermese python throughout the United States, which is in part an attempt to prevent the species from becoming established anywhere else. There is also suggestion that removing canals will help prevent spread of these animals within the Everglades. There is also much being done to remove the snakes that already live in Florida. Snakes are lured, trapped, tracked, and caught in all sorts of ways. There's even a hotline for locals to call in sightings. Overall, people who manage the areas where these invasive snakes occur basically have a kill every python they can capture policy. As with any invasive, they shouldn't be there, so this is a good sort of policy to have.
Source is the Global Invasive Species Database. Images are from Wikimedia Commons and are under Creative Commons licenses or are copyright free: one, two, three.