David Wimpfheimer is a biologist and naturalist with a passion for the birds and natural history of the American West. David has been leading trips and expeditions for almost forty years, teaching classes for the Point Reyes Field Institute, Marin Agricultural Land Trust, and the California Academy of Sciences, as well as guiding tours in Mexico, Alaska, Scotland, and other regions for groups including the Smithsonian Institution, Wild Wings, and Road Scholar. He is especially knowledgeable about the Point Reyes peninsula where he has lived since 1980.