CT "Your tantaun will freeze before you reach the first marker"

Does anyone know if tauntauns are native to Hoth? Because if they are, I find it a little bit strange that an animal that is indigenous to a ridiculously cold planet would not evolve to withstand extreme temperatures, including temperatures below the freezing point.

 

I think it's clear that they can survive below the freezing point, but it is quite plausible that there are certain regions or extremes - especially at dusk - where it just gets too cold, especially when the beast has been exerted.

You can literally run a horse to death, and I always got the impression that what Han did to his tauntaun was something similar.

 

Thanks, guys