What do snowy owls do during the day? Most of the time by my observations they sleep or go between sleeping and waking up. A few times I have seen them fly to catch prey. The appear to be mostly sedentary during the day.
I saw two different owls this day. This is the same owl when I arrived and before I left. I was there around 4 hours, but watching them maybe less than half of the time I was there. They appear to have remained in the same locations from the time I arrived until when I left. All the photographers seemed to be respectful and keep a distance.
Nature is fascinating. Enjoy it from a distance.