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ORIGINAL: timbercruiser



Because the timing of the rut is set to maximize fawn survival. In the north, the deer breed during a very short window so fawns are all dropped about the same time--early enough to gain enough weight for the coming winter, but late enough to survive any late snow or severe cold. Deer in the south have a longer breeding period because fawns typically don't have to deal with harsh elements.

Northern deer rut dates are quite predictable and it's based on calendar, not moon.