I took "more tolerant of their environment" to mean something else. Plenty of animals can wander around in apparent comfort equally well in the middle of winter as they can in the heat of summer, while we'd get hypothermia (at least without a good winter jacket) or heatstroke in the same conditions.Animals are not tolerant of the environment, that's awful fuzzy headed greeny-weenyism for you. Suppose a city had a nice park next to a stream with old-growth cottonwoods, and they decided to import some beavers for local color. Kiss those cottonwood trees goodbye.
Camanintx, was that what you were getting at?