1. Washington Department of Fish and Wildlife, P.O. Box 43141, Olympia, WA 98501 USA
2. Canadian Wildlife Service, 9250 49th Street, Edmonton, AB T6B 1K5 Canada
3. US Forest Service, Thunder Basin National Grassland, 2250 E. Richards, Douglas, WY 82633 USA
4. US Forest Service, Dakota Prairie Grasslands, 2000 Miriam Circle, Bismarck, ND 58501 USA
5. The Nature Conservancy, 4889 Eagle Harbor Drive, Bainbridge Island, WA 98110 USA
6. Pronatura-Noreste, Loma Larga 235, Monterrey, Nuevo León, 83260 México
7. Bird Conservancy of the Rockies, 230 Cherry Street #150, Fort Collins, CO 80521 USA
8. Universidad Autónoma de Chihuahua, Administracion de Correos 4-28, Chihuahua, Chihuahua, 31000 México
9. Northwest Wildlife Consultants, Inc., 815 NW 4th Street, Pendleton, OR 97801 USA