The Burmese python has become a major risk to biodiversity in the Florida Everglades.
The snakes have secured a foothold after having escaped or been released into the wild by pet owners. Many of may remember this story of a Python bursting after trying to swallow an alligator.
This January was particularly cold in Florida and many pythons didn't survive the exteme cold weather (well for Florida!).
Before the cold weather researchers from the University of Florida implanted radio transmitters and temperature loggers into ten pythons they had captured and then released again. Nine of the ten Pythons died during the cold weather.
99 other Pythons were found of which 40 were dead. It is hoped that this has checked the spread of the Python and will allow numbers to be controlled.