I am a newbee beekeeper and in September I noticed a lot of dead drones, which I expected since the workers throw them out. In the past 10 days though I am noticing a much greater number of dead worker bees at the entrance landing board This is every day, anywhere from 15-30 dead worker bees. These are small hives, with one brood box and medium for each hive.

Should I be concerned or is this the start of CCD or whatever?