Where I hunt in SE Alabama there are 2 definitive estrus cycles.

The first is typically about December ... +/- a week or so. The second cycle is typically late Januarey +/- a week or so. The reason for the two groups, I have read, is that there is a large population of deer that have kept the estrus cycle closely timed to their ancestors, which were deer stocked into SE Alabama in the 1930's from northern states. The January cycle is the typical of Alabama native populations. I have seen this late cycle peak well into February. I have never seen indications of does in heat down this way before around November 25.