Exotic Species
I was googling "Axis Deer" yesterday and ran into a site that said there are over 37,000 in "Texas" with some running free on state lands. I think they are a warmer weather species so I don't expect we'll ever see them in the central and northern states but they could eventually spread to the southern tier. Of course even if there are a thousand or so on open range it will tale a "long" time for them to appear in hunting quantities.
I wonder if the Antelopes, Sable, Kudu, Ibex, Thompsons etc will find their way into the open range too.