Note mature males can be hard to spot in an environment like this as can the females given enough field cover. This is nature's way of protecting the bird and also hiding it from it's potential prey as it does with so many other species. I have been told by a reliable researcher from his studies that he had determined most if not all the Snowy Owls are coming down from what he called the Hudson Bay corridor. He is in the process of collecting DNA information to determine lineage as well.