from the USGS
Paragraph number 2 read a little further next time.
Methodology/Principal Findings
Here we show that a predicted continental expansion is unlikely based on the ecology of the organism and the climate of the U.S. Our ecological niche models, which include variables representing climatic extremes as well as averages, indicate that the only suitable habitat in the U.S. for Burmese pythons presently occurs in southern Florida and in extreme southern Texas. Models based on the current distribution of the snake predict suitable habitat in essentially the only region in which the snakes are found in the U.S. Future climate models based on global warming forecasts actually indicate a significant contraction in suitable habitat for Burmese pythons in the U.S. as well as in their native range.
They are saying that it will not be spreading and because of the climate changes the are in which they can have a habitat is actually shrinking in the us. please read this and every one please post a comment about it.
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