Hearted Youtube comments on Casual Earth (@casualearth-dandavis) channel.

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  2. I did my senior thesis in college on this exact topic several years ago. This video almost feels like you read my notes from my defense giving this presentation. The biggest takeaway from my research was what you briefly touched on with their dormancy behaviors. In almost every case I could find, they continued to bask as temperatures approached freezing, to the point that many would develop moderate to severe respiratory infections in temperatures around 30F-45F, even if they did survive a short cold spell. These respiratory infections were often fatal even when treated (cannot remember the source, but I believe it was a smaller institute conducting research near Jacksonville, FL). Gopher tortoise burrows, like you explained, would be one of their only refuges if they were to make it to the panhandle due to how deep they go, and those are becoming scarcer by the year. If they were to make it into the limestone caves that you start to see in the Appalachian Mountain Range, they would have a chance in the foothills of the southern range, providing better dormancy behaviors were selected for. I concluded they would likely not expand much farther than the ranges of the American crocodile without further selective pressures, and at most make it as far north as mangrove forests in the relatively near future with a bit of luck on their side. Props to the video! Really took me back and many of these studies were not around when I did mine. Super cool to see more about it six years later.
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