We had a few days of flying here with temps in the low 50s and both C1 and C2 were very active.
My wife has a tray of mixed nuts on our front porch for the squarrels and birds, but the bees were going wild for them.
I couldn't really see any pollen on anything, surely there was now nectar and the tray was not water soaked, so it wasn't a water source either. It just seemed like a strange place for honeybees it congrate.
I even looked for any signs of pollen packing and didn't see any, I assume the smell or color spectrum must have enticed them, but once the landed, they stayed for a few minutes each.
It was interesting behavor, I don't think there was any salted nuts, but there were peanuts, pine nuts and sunflower. Let me know what attracts them to these if you know.
PS.... All is fine here as we near the second month of the new year - wow, January is flying by. The hives are still heavy with honey and I think if we have a milder February this year (than last) we should have not problems making it through the Winter - again, it's usually WINDS that burn the most fuel from a hive NOT temperature, so a great wind break is a valuable tool in extending your food supplies in the hive.