And finally, the most popular location for invasive species stories in 2014, at least from my count, was Florida, from its lionfish to its tegu lizards. David A. Steen had a great story at Slate explaining why the Sunshine State is so prone to invasive animals, particularly reptiles. And a new study on invasives came out this year, too, suggesting that these species are so successful because their native habitats include such high diversity of other plants and animal. They evolved amidst a lot of competition, according to the paper, and thus are primed to be successful when introduced to a new environment. For more on that topic, read Carl Zimmer's great piece at his New York Times column, Matter.