I did a full inspection of my two top-bar hives that sit side by side yesterday. I had suspected that they were bringing in a lot of dusty substances other than pollen as it was a bit early for any/much pollen to be available. Also, I had seen bees around the bird feeder and I suspected they were loading up on the dust from the birdseed. Not much nutrition in that. I got confirmation that was exactly what was happening when I inspected the second hive. There were sesame seeds all over the floor. Hive number one had none. It's interesting how two hives, within three feet of each other, will target completely different food sources. Apparently hive number two likes sesame snacks.