I live in Hawaii where we have many feral Jackson's. Near the top of a local mountain there is a thriving population at 4,500 feet elevation. Maximum daytime temperature is maybe 70, average 60. nightime it often freezes. They seem to do quite well in these temps and mating behavior is easily observed. It is a mile or more to get to a warmer region and the same Jacksons are observed daily so I doubt they are "commuting". If these particular ones can do well in this climate wouldn't keeping them on the non-tropical mainland be easy? at my mainland residence an unheated cage would stay within these temperatures even outdoors. I thought jackson's needed higher temperatures???