I had two hives at one yard that both died over winter (one starved with honey about an inch from the cluster, and the other got wet). Not the point of my story though...
I went to the yard to remove the boxes and get them prepped for the next occupants, when I saw several honeybees around a one hive. I quickly got another box ready with ten frames of honey from another dead out with plans to give them an extra bit of food in case it got cold again (still freezing at night up this way).
Opened the hive to have a quick look see and found a dead cluster of bees.
Upon looking further, I found several bees in said hive, but no signs of a queen, nor queen activity.
Looked at the girls coming and going, and although I have never attempted bee lining, was able to see them heading towards the forest near the property. I think a feral colony found the unused stores in this hive. I am tempted to let them rob it so they can build up and then try and track down the hive...
I have about 25 frames of honey in storage, so that isn't really an issue.
Just sucks I went from the exaltation of my bees are still alive to the unhappy realization I was right the first time.