Snow Circles

Snow circles have started appearing all over Habitat Home. They did not concern me at first.  I assumed that they were from deer bedding down for the night.  But now they are appearing very close to the house.  Do not know why that has surprised me so.  I know that there are deer everywhere on the property but  I just assumed that they came up to the house only to browse the tasty shrubs and plants.  Never thought that they spent much time up here let alone that they were sleeping  practically outside my bedroom window.  The beauty of the snow has quickly faded now that it is marked extensively with lots of tracks (mostly deer, rabbit and squirrel) and beds.