Skipping winter clean up also provides wildlife with a food source. Not only will the uncut Coneflower create winter interest in the garden, the seeds left will be eaten by birds and other critters. Joe Pye Weed flower heads grow a mass of seeds too. Native grasses will have the same impact in the garden at winter time. Wild roses left untouched, produce rose hips to eat, they are red, fleshy fruit with seeds inside.
Berries as seen in picture above are an excellent food source. There are several native species of berry producing shrubs to choose from like Highbush Cranberry, Elderberry, Nannyberry, Chokecherry and Smooth Arrowwood are good choices. Make a hedge out of these shrubs and create a food source and shelter at the same time!
Staghorn Sumac form cone shaped clusters of fruit with a waxy outer layer, a fleshy middle layer, and the seeds at the core. The bright red clusters stand out really well in the snow. It's bark is also used to eat by rabbits, foxes, squirrels, deer and moose.
Native willows such as the native Black, Peachleaf, Pussy, Bebbs or Sandbar Willow are important sources of food for many different species of animals such as deer, elk, moose, rabbits, beavers, and porcupines. They browse all plant material of Willows, leaves, twigs and the bark. In addition, willows provide habitat for many different species of birds and small mammals.