After going through the hive of our sole survivor colony (Wohooo, 6 live bees!), I found the remains of yet another emergency queen cell. This is the 3rd hive out of 4 that had queen issues for us right before winter? The fourth hive had gotten a new queen in the fall due to queen issues that may or may not be related. Of these 3 hives, one was a spring package, but 2 were swarms, one swarm was from an unmanaged 10 yr old bee tree, the other came from who knows where. All of these queens where very productive through out the year. Is there something attacking queens? Is there something in my area in specific that could be causing this that I need to watch for?