Colaptes cafer collaris: Red-shafted flicker 287 Habits 287 Distribution 294 Colaptes cafer cafer: Northwestern flicker 296 Habits 296 Colaptes cafer martirensis: San Pedro flicker 298 Habits 298 Colaptes chrysoides chrysoides: Cape gilded flicker 299 Habits 299 Distribution 300 Colaptes chrysoides mearnsi: Mearns’s gilded flicker 301 Habits 301 Colaptes chrysoides brunnescens: San Fernando flicker 305 Habits 305 Colaptes cafer rufipileus: Guadalupe flicker 306 Habits 306 Literature cited 309 Index 323 INTRODUCTION This is the twelfth in a series of bulletins of the United States National Museum on the life histories of North American birds. Previous numbers have been issued as follows: 107. Life Histories of North American Diving Birds, August 1, 1919. 113. Life Histories of North American Gulls and Terns. August 27, 1921. 121. Life Histories of North American Petrels and Pelicans and their Allies, October 19, 1922. 126. Life Histories of North American Wild Fowl (part), May 25, 1923. 130. Life Histories of North American Wild Fowl (part), June 27, 1925. 135. Life Histories of North American Marsh Birds, March 11, 1927. 142. Life Histories of North American Shore Birds (pt. 1), December 31, 1927. 146. Life Histories of North American Shore Birds (pt. 2), March 24, 1929. 162. Life Histories of North American Gallinaceous Birds, May 25, 1932. 167. Life Histories of North American Birds of Prey (pt. 1), May 3, 1937. 170. Life Histories of North American Birds of Prey (pt. 2), August 8, 1938. The same general plan has been followed, as explained in previous bulletins, and the same sources of information have been utilized. The nomenclature of the 1931 check list of the American Ornithologists’ Union has been followed, but it has seemed best to continue in the same order of arrangement of families and species as given in the old check list (1910).