Yesterday while I was observing my hives, I noticed a drone walking in the grass. After looking around for several minutes, I found a handful of them walking around sort of in a stupor. Did not notice any workers in the same condition. They all seemed to be light colored (just emerged?) I could find nothing wrong with them - but they did not fly at all. I could not tell which hive they were from (I have 4) as they were all over the place and some were quite a distance from the hives.
I see nothing else even mildly interesting around, under, or on the front porch of the hives. Worker bees flying normally, nectar flow is clearly on.
Am going to look through hives at earliest good weather day - but am looking for ideas?