Marshall, 1942 Bubo virginianus w.slope. 702 Esmeraldas March 31 in pine belt ½ way down mt., lots at night (full moon) heard calls so called the owl to me (flushed when I shined light & so I waited until I saw the long ears & the rotating head before it silhouetted against the moonlit sky before I shot. Perched in the pines ½ way or more up. Called with double note instead of usual single 2nd syll. - - , - , - . San Ignacio, 3000 ft. April One heard once in pines in early evening.