Yes they may well have moved back into these areas, but why if more favourable conditions exhisted where they already were? There must have been a survival reason for that.
As for temp controlling movement, quite agree, they will probably move to more notherly lattitudes, as will other species, but why move north if the conditions in there present range have become more favourable?
I quite agree with Data to back things up, hence my first post, We have no facts just opinions, as no satistical studies have been carried out in this area.
Hence the OP should listen to opinions, and then make their own mind up, but you classed that as misleading.
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