First off - I am quite new to beekeeping as a hobby.
Yesterday afternoon after work I was out back just watching the beehives from a distance for the fun of it. There was quite a summer thunder shower coming up with lightning and thunder getting too close for comfort, there was a lot of activity around the hives and I thought it was just everyone hurrying back before the storm hit, but I noticed a mass of bees, maybe 60 - 80, on the outside of the hive. First time I've noticed anything like this, any ideas?