9 degrees today, so I've just taken the opportunity to check on my girls. Natural Varroa drop over the last two months: one hive had 5 mites, all the others zero. Be interesting to see what happens after a dose of OA.
There are two light hives (late swarms) on which I'm running overhead 2:1 and candy over winter. The parrots will tell you that bees won't take syrup when it's cold - well, mine are still sucking about an inch a week - such a small amount suggests to me that they're living on it, rather than storing it.
I noticed today that on one hive (the lightest of them all) they've built a ring of brace comb directly beneath the crown board's jar feeder hole, so incorporating the feeder into their brood nest area. I've often seen similar examples of bees building comb inside or next to feeders - right next to the food supply, whether bee-made or man-made. They ain't daft. Which pretty-much confirms my hunch that they're living on the syrup as well as stores.
LJ