4. Marshall, 1938 Otus flammeolus Whitakers - contin. perch.Gave other 3-syll. call for while, inter- spered with regular hoots. Resumed regular hooting. I climbed tree 15 ft. away with gun & light.hoping to see owl when I reached his level.Top broken - seat- still below owl. HE kept hooting. Tied lyslf to tree, moon rose (last ¼).Owl kept calling. Once in while would stop altogether,reeeem- recommenced only after I called;therefor wouldn't have hooted all night if I hadn't called. Dozed- heard owl allthe time - awoke in ½ hr.before daybreak. owl was calling far to E.I called & it immediately came to or original perch,& hooted steadily.At lst. indica tion of dawn,stopped/,. Heard 15 min. later - gave several calls far to NE, now fairly light. Probably feeding in this interval. Had probaby eaten in early evening , again at dawn. No foraging all night ( constant hooting) unless gets spiders & insects from high in trees. Arboreal? Many spiders in My tree.But hooted at regular,short intervals all night. Obviously didn't go to nest - no others heard;probably not nesting - nesting over? If so, why persist- calling? Why territorial behavior?Perhaps a solitary individual trying to attract mate. Definite territoryality regular perches within given area 300yd n&S by 75 yd. up & down hill. Definite song perches established in similar and safe spots.Not yet certain of identityl May 21 Returned at dusk to cedar perch 50 yd. abov e contral fir perch.Called continually. Heard nor saw nothing until almost pitch dark. (No moon) Batlike form fäitted past nose - sil- uoetted against W sky.Was within 1½ ft. of face Came from SE - uphill.Saw something flick in middle cedar tree perch.Owl began softly to hoot saw it leave thru opposite side tree.Resumed orig perch in fir & hooted.Tap trunk, flew; answered far to N.Followed but it soon stopped calling.Foraging? I stationed myself in opening in timber where trunks silhouetted . I called 20 min.At length figure size lg. bat flew swiftly & silently overhead,25 ft up. from NW. Flew