Today was a cool day around here, reaching mid-60s at the most. Through most of the day (well, at least in the morning and mid-afternoon, when I was around to look), there was just a small amount of activity at the hive entrance. About 5 pm, though, I looked across the field and saw the air thick with activity, and when I went to the hive, they were just coming and going like crazy. Now, it wouldn't have bothered me if it was 80 or 90 degrees out, but it's only 62! We watched them and they were traveling to and from somewhere to the southwest, into the pinelands. It didn't look like fighting, as I imagine defending against another colony might look like. They mainly would just hover in the air for a while before landing, and lots of them, like on a hot day.
I know the hive is growing. Do they naturally get more active at lower temperatures when they get more populated? I took pictures and could post one if I knew how.