Information on the migration of the Flammulated Owl (Otus flammeolus) in California is minimal (Bloom 1983, Winter 1974, Collins et al. 1986). This paucity of data is perhaps due to the species’ strictly nocturnal habits and its habit of not calling during the fall, making detection very difficult (Winter 1974). The Flammulated Owl is found mainly in the Transition Zone of California, most often in forests of Ponderosa Pine (Pinus ponderosa), Sugar Pine (Pinus lambertiana), Douglas Fir (Pseudotsuga menziesii), White Fir (Abies concolor), Incense Cedar (Calocedrus decurrens), and Black Oak (Quercus kelloggii) (Winter 1974, 1979, Marcot and Hill 1980). The Flammulated Owl is almost exclusively insectivorous (Marshall 1957, Ross 1969, Goggans 1985) but rarely takes small vertebrates (Johnsgard 1988).