All the bees in my home yard are on a flow as well. All that is but two hives which are still tightly clustered (one is Carniolan and the other a late season cutout from last year). We have been having highs in the low to mid sixties and lows in the 30's and 40's, but they are still busy as can be during the day. Lots of mostly yellow pollen coming in. Not sure what it is as most the dandelions here bloomed in Dec. and are now seeded out. Prior to this activity, all I was seeing were bees gathering from the chicken feed on warm days.
"The UNKNOWN, huh? That would be SNORBERT ZANGOX over in Waycross."