Turtles live for years and years. Even clay ones. This one has inhabited my gardens for over 20 years, providing cover for slugs and sowbugs, and support for baby plants. (For the slugs to eat, as often as not.)
The snow is warm, he says; it keeps the wind off.
The dry stalks are last fall's nasturtiums. And the green leaves in back are next spring's hollyhock, hoping for a warm winter.