Yes they can shift - makes me wonder why so many get squashed on the road!
I don't normally see them unless I go up the garden in the evening, but can hear them.
They are always round the bottom of the bird feeder and of course they use their house for my food.
I do know they come down into the small Patio area near the house though as they have dug up my Primulas and flung them onto the path!! ----- Twice!!!