Marshall, 1939 Otus flammeolus Village, South Rim Grand Canyon, Ariz., Ariz. July 18 1939 Left Public Camp at 12:30 A.M. No moon, calm, clear. Walked east to open groves of tall yellow pine on gentle slopes on E. edge of village. Heard or on N side of highway. Traced to small, dense yellow pine in clearing of artemesia. Notes of normal pitch, tempo, & variations. Flew across clearing to dense young pine on edge - called again. I approached within 50 ft. & he changed to rushing note - husky, much lower pitch & with a distinct added syllable: boot-opp foot-le a minor 3rd - the last & 1st 2 syll. on same note. Located as sat next trunk or living limb 25 ft. up. Quick eyeshine. Called gleady with protest assent-note. I heard from the other side of clearing a series of high-