Nuttall's Woodpecker Supersp #27 Picoides nuttallii Gambel        Field Guide IDs: NG-280; G-196; PW-pl 40; AW-pl 369; AM(II)-234 Nest Location Nest Type Eggs & Mating System Dev. & Parental Care Primary & 2ndary Diet.. Foraging Strategy MF I: 14 DAYS ALTRICIAL DECIDUOUS TREE 2.5 feet - 60 feet F 4-5 (3-6) MONOG F: 29 DAYS MF BERRIES HAWKS BREEDING: Oak woodland, chaparral, riparian (esp willow-cottonwood) woodland; often foothill canyons. ? broods. DISPLAYS: Mostly territorial: head bobbing and turning, crest raising, bill directing and raising, wing spreading and aerial displays. NEST: Usu in dead riparian decid tree. Unlined. Excavation ca. 13 days, not reused. EGGS: White. 0.9" (22 mm). DIET: Insects (80%); also few acorns, sap, occ grain. Nuthatch style of gleaning from underside of limbs CONSERVATION: Winter resident. NOTES: Pairs remain on year-round territories. Male performs most of incubation including all nocturnal incubation and brooding. Preferentially forage on oaks; females forage on smaller branches and twigs more frequently than do males. Occ hybridizes with Ladder-backed and Downy, with which it is especially territorial. Breeding biology similar to that of Ladderback. STANFORD. NOTES: Fairly common resident, breeding in a number of areas on campus, especially around oaks. One pair nested in a large century plant in the old cactus garden, another in the oak near the Faculty Club patio. ESSAYS: Island Biogeography; Nonvocal Sounds; Feet; Hybridization; Interspecific Territoriality; Who Incubates? REFERENCES: Jenkins, 1979; Miller and Bock, 1972.