There will often be even more bees drinking than in this picture. They seem to like the moss a bit more than the sand.
While watching them leave the bird bath and fly back to their hives, I saw several flying out of the yard. I followed their flight path and discovered a feral hive in the redwoods behind us. This must be the swarm I saw fly up that way a year or two ago. I can not see the hive entrance itself, just bees flying around the general area.
