Wolf Trap Resource Briefs. Ongoing monitoring of forest vegetation occurs at 6 plots spread throughout Wolf Trap's forest areas. At these plots, the trees, shrubs, vines, and specific non-woody plants are identified to group or species, and trees are measured and labeled. Any evidence of deer browse on trees or shrubs is noted. Diseases and pests are also noted along with targeted invasive plant species. Fallen and standing woody debris (that provides essential habitat to many types of wildlife) is also monitored.