Marshall, 1939 Otus flammeolus Flagstaff, June 2 [Several times while chasing the previous O with the slightly higher-pitched voice had heard a low harsh squawk - something like a spotted owl. ] Walked 300 yds W along the top of the flat ridge thru open forest of yellow pine. Returned & called up O at head of previous canyon - may have been same high-pitched one. Very shy - altho came into pile above my head once. then heard double squawk notes (Spotted or Barred Owl?) & O.F. called far away to NW - then silent. Tried to follow big owl - couldn't see it, altho it squawked several times from tops of dead pines. Walked back to camp - no more owls heard - getting light in E.