1. Klamath Bird Observatory; P.O. Box 758 Ashland Oregon 97520 USA
2. Point Blue Conservation Science; 3820 Cypress Drive #11 Petaluma California 94954 USA
3. U.S. Forest Service Pacific Southwest Research Station-Arcata; 1700 Bayview Street Arcata California 95521 USA
4. Klamath Network, National Park Service; 1250 Siskiyou Boulevard Ashland Oregon 97520 USA