Marshall, 1947 Otus asio Apr 5 Sonora, Trucumme Co., Calif. PM hunted for owls - called Otus, cryptolaemus. Heard only Otus asio & Bubo. (Hear[ed] p[oorly], Apr 6 midnight.) Full moon. Some clouds. calm. Sonora [illegible] Horned Owl. tagger hill Horned Owl newer road Blue Oak Digger Pine old road atoll Dry grass underbrush meadow pool marsh Rader's Place (where I started) 1 mile Map of Screech owls during hike thru 1 mile uniform blue oak & digger pine. 6 tars, evenly spaced. Horned Owls heard at distance - they were on ridges.