Most of my field work is concentrated in the western United States, including Alaska, Arizona, California, Colorado, Idaho, Nevada, New Mexico, Oregon, Utah, Washington. I also have done field work in Canada (British Columbia, Newfoundland, Ontario, Quebec), the Dominican Republic, and Paraguay.
Recent field work has focused on collecting samples of Steller's Jays and Gray Jays for phylogeographic studies, and on revisiting sites in the Cascade-Sierra Nevada mountains for the Grinnell Resurvey Project. This project celebrates the centennial anniversary (1908-2008) of the Museum of Vertebrate Zoology. The summers of 2006-2007 were spent working along the "Lassen Transect," which extends from the Sacramento River near Red Bluff to the Nevada border. Starting in 2008, field work will extend to the southern Sierra Nevada where we will begin to resurvey the "Whitney Transect."