Bees flying on January 7th

I went to check up on the apiary at Kildallon on January 7th 2017. Apart from two nucs, all hives were hyper-active. I had a quick check on the two nucs that weren't showing much activity, and all well there. Took a quick video of the entrance to one of the hives. No sign of pollen going in, so they must be after water to break down the ivy honey which has crystallized. Ivy is the last major flow in Ireland, and so it usually makes up a sizeable portion of their winter stores.