1. Albany Pine Bush Preserve Commission, Albany, NY, USA
2. Cazenovia College, Cazenovia, NY, USA
3. Audubon Society of New Hampshire, Concord, NH, USA
4. Carleton University, Ottawa, ON, Canada
5. Superior National Forest, Duluth, MN, USA
6. Bernheim Arboretum & Research Forest, Clermont, KY, USA