Hello, I'm in my fifth year of beekeeping and I've only lost one hive until this year, the hive I lost was my fault, the queen had died or been killed and i didnt notice, I saw queen cells and cut every one out (Rookie mistake)! This year I've lost five of my hives, no dead bees just empty hives. I live in North Carolina and the temperature had been in the 100 degree range for about two weeks straight. Out of the hives lost One was a five year old hive, two were two year old hives and two were first year hives. The most recent was a first year hive that appeared to be doing the best out of my five first year hives, Sunday I witnessed 1000's of bees outside the hive but they werent bearding they were spread out all over the front of the hive (brood chamber and the deep box) Which wasnt unlike this hive they never seemed to do the typical bearding like my other hives, Well Monday afternoon this hive was totally empty. From the checks Ive done the mites arent at an alarming level, I do have shb but never see more than one or two per inspection. I have had swarms this year and witnessed four of them in all honesty I do think my second year hives did just swarm and swarm until there wasnt any left but as for the five year old hive and the first year hives they all appeared very strong then totally empty with very few dead bees left inside. I love my bees and feel like I'm failing them. I wanted to add I run ten frame equiptment, two deeps and when the time is right two medium supers, with nine peirco plastic frames.