Marshall, 1942 Otus trichopsis Los Esermile. March 8 heard & attracted to us far down on a slope - no forest - all cleared - apparently lived in little group remaining pines & fruit trees around the farm house. March 1 One heard in evening in oaks across cleared March 2 called up in daytime - called from lg. oaks left in 2nd growth area. March 24 Pair calls very early in evening when still light, Later answer only once & don't come in. Finally got a 9 2145 on next ridge in a little remaining grove pines. High note - am no longer sure about difference in pitch being conf with set. (Young out by last wk W slope Los Esermiles) March 31 Very common in the Pinos coerags belt - several pairs heard & 2279,2225 taken when they came to my imitated Cryptogam notes. Perched in young pines & low in the oak where I was trying to sleep. San Ignacio, 3000 ft April 6 heard in Pines in evening.