Pacific-slope Flycatcher Empidonax difficilis Baird       Field Guide IDs: NG-292; G-214; PW-pl 42; AW-pl 549 AM(II)-268 Nest Location Nest Type Eggs & Mating System Dev. & Parental Care Primary & 2ndary Diet.. Foraging Strategy F I: 14-15 DAYS ALTRICIAL CLIFF GROUND 0 - 30 feet F 3-4 (3-5) MONOG F:14-18 DAYS MF HOVER & GLEAN BREEDING: Decid and conif forests and woodlands, esp near water.? broods. DISPLAYS: ? NEST: Wide variety of situations from stream bank or roots of upturned tree to eaves, cliff ledge, cavity in small tree; of moss, lichen, rootlets, grass, leaves, bark, lined with shredded bark, hair, feathers. EGGS: White to creamy, spotted with browns, occ lavender, esp near large end. 0.7" (17 mm). DIET: Also few berries and seeds. CONSERVATION: Winters from n Mexico to s Mexico. Rare cowbird host. NOTES: Often interspecifically territorial with Hammond's Flycatcher in Pacific n w. Female broods. STANFORD. NOTES: Uncommon migrant and summer resident in more heavily vegetated areas; most abundant during migration. Few pairs breed on campus, though one or two pairs can usually be found near the Mausoleum in summer. ESSAYS: Interspecific Territoriality; Sibling Species; Birds in the Bush REFERENCES: Beaver and Baldwin, 1975; Davis et al., 1963; Johnson, 1980.