Supplemental feeding of Mighty Mealey meal worms saved almost all of my early arrivals last year. I have four ASY birds that arrived back to my colony 3 days ago.
They are fighting temps in the 20's at night with very few insects flying during the days in severe high cold winds. Fortunately these four birds recognize me when I walked under the colony with my flipping spoon, and remembered how to catch the "flying meal worms" even in the high winds, at least 4 times per day. Hopefully these feedings will keep them alive until it is warm enough for the insects to take to the air.
I have put white pine needles into all 96 nest boxes in Troyer T-14's, and Troyer Gourd racks to help keep the arriving birds as warm at night as possible.
I hope that other Colony Landlords recognize the dangers of hypothermia and starvation that our early arriving birds must fight. Supplemental feeding via Flipping meal worms is the most fun you can have with your birds! Teaching them what you are trying to do to help them is almost as much fun as having a returning bird recognize you and watching that learned skill he shows you when he catches the first flying meal worms that zoom up to him!!
Good Luck!