Greenbelt Selected Wildlife Habitat contains polygon mapping of Deer Wintering Areas and Deer Yards for Guelph District and Midhurst District.

A Deer Yard (Stratum 1) is often referred to as the core of a deer yard. Deer use this area when mobility is most restricted under severe winter conditions (when snow reaches depths greater than 46 centimeters).

A Deer Wintering Area (Stratum 2) is the area occupied by deer in early winter or occasionally all winter during mild winters. A mild winter occurs when the snow cover in the area is light and fluffy, and less than 30 centimeters.