Ash-throated Flycatcher Supersp #30 Myiarchus cinerascens Lawrence       Field Guide IDs: NG-296; G-208; PE-l94; PW-pl 41; AE-pl 472; AW-pl 548; AM(II)-276 Nest Location Nest Type Eggs & Mating System Dev. & Parental Care Primary & 2ndary Diet.. Foraging Strategy F I: 15 DAYS ALTRICIAL 3 feet - 20 feet MF 4-5 (3-7) MONOG F: 14-16 DAYS MF BERRIES HAWKS GROUND .......GLEAN BREEDING: Scrub, chaparral, open and riparian woodlands, esp oak and pinon juniper.? broods. DISPLAYS: Little geographic variation exists in the basic vocal repertoire of 4 call patterns; repertoire fully developed by time of fledging. NEST: In natural cavity, old Cactus Wren or woodpecker hole, or often hole in fence post; nest soft, of hair, fur, feathers, grass, occ snakeskin. EGGS: Creamy, marked with browns, purples, olive. 0.9" (22 mm). DIET: Includes some small fruit. Occ gleans from bark of branches and trunks. CONSERVATION: Winters s to n e Costa Rica. NOTES: May usurp nest holes from small woodpeckers. Will occ defend territory like kingbird against hawks. STANFORD. NOTES: Uncommon migrant and summer resident in wooded areas at the Dish, nesting in natural cavities and old woodpecker holes, usually in oak woodland. Fairly rare during migration, and not known to breed, on main campus. ESSAYS: Great Plains Hybrids; Vocal Development; Natural Selection; Territoriality. REFERENCES: Lanyon, 1961.