Rural Gardening: Worker bees crowding around entrance to hive..., 1 by Hemlock93

Hemlock93 wrote:
Recently (within the last two weeks or so) our honeybees have been gathering in large numbers (abt. one hundred or so) around mainly the bottom entrance to our beehive. They aren't really crawling on one another - they are mainly gathering on the same level, sometimes in lines. This happens to some extent during the day (the picture is of this), but they start really grouping up around nightfall.

I have also spotted a drone several feet outside the hive. He seemed very weak.

Does anyone know what this means?

Thank you!