http://www.nytimes.com/2015/04/06/us/the-burmese-python-snake-thats-eating-florida.html?ref=science
http://www.wuft.org/news/2015/03/31/four-snake-species-added-to-restricted-list/
In South Florida, wildlife officials have struggled for years with tens of thousands of the creatures: specifically, a species known as the Burmese python, an interloper from Southeast Asia that has taken up what looks like permanent residence in Everglades National Park and other areas of the state.
According to the U.S Fish and Wildlife service, this creature can grow up to 12 feet or more and a weight of 250 pounds and now that they are in the Everglades they have sharply change the ecosystem by eating most of the animals in those marshes. Some mammals and other species native to the Everglades seem to have disappeared. Now the U.S. is making it illegal to import wild and dangerous animals as pets from around the world. Those animals later on will be released by their owners or escape. This is causing great changes to the environment.
These are some animals that the U.S. made illegal to import: Burmese python, Asian snakes, Argentina tegus, Large lizards that feast on sea turtles eggs, venomous lionfish from Asia, Nile monitor lizard from Africa, zebra mussels from Russia, these species are harming the water and plants in their unnatural environments.
In 2009 a horrifying attack from Burmese python in North Florida occurred when a 2-years old girl was strangled by a Burmese python that belonged to her mother’s boyfriend. Both of them were sentenced to 12 years in prison by manslaughter.
I have read that the U.S. have tried to control this by capturing the snakes but they are just wasting their time because they are reproducing fast. They should start with more security when people who are importing these animals. The core democratic values of liberty, property and responsibility are in conflict in this situation.