More than half are invasive species....
North America is still recovering from the last Ice Age. After the ice retreated there are a lot of niches in the environment that are now unfilled, that is why southern species like the armadillo are migrating up through Texas to Florida. Any tropical species. L that makes the Florida will do very well until the next glacial period.
It's amazing how much money we waste trying to keep these tropical species out of Florida. Nature will go where it can go and all the Pointdexter with badges and federal Service can't do crap about it.
I know get mad at me, but what does invasive species actually mean?
Yes, they may be an invasive species but that doesn’t make them any shorter.