Koford 1 strigidae Pulsatrix perspicillata July 19, 1956 BC Island, Canal Zone. Dawson about 15' above ground under leaf canopy in dark woods 100 yds NW of New Lbl. about 6:40 a.m. A Monster near giving mot-mot-mot (not what we hear woof-woof-woof heard too far from bird watcher.) and deep double like coo. No owl voice heard. October 6 (about), 1956. In evening heard call of 6 low notes, 3/sec., push-push-push, of quality of shaken large plywood sheet. Repeated again & again, 100 yds. W. of New Lbl- About a week before heard similar calls in evening 200 yds SE of Chapman House, followed by higher & softer answer of 5 notes, both repeated again & again. This time I thought it might be a large frog tood. Could be large owl. October 31, 1956 at 5 a.m. one of same calling W. of New Lbls, Like shaking wooden ward latch + fork November 21, 1956 2 to 3 a.m. One (?) calling repeatedly in vicinity of Davids Yr., apparently high in trees. Little musical quality. Like knocking 5 or 6 times on panel of wood door, last 2 or 3 knocks being gentler than first 3. 3/sec. December 5, 1956. Heard again 100 yds. NW of Test Table Bldg., about 6 a.m., with apparent answering call. January 4, 1957. Heard (wooden panel boote) in evening and early morning west of 1952 Lbl. 23 January 1957 Heard in early morning N. of Allen House. 19 January 1957 Saw 2 about 20 yds. left of AVA Trail near 9. Pitched 10' apart, 15' above ground, in lower branches trees. About 4 pellets containing brown & hair below push, suggesting previous use.