Marshall (1942) = Otus cooperi cooperi Otus choliba ? ? 1. Olomega Faint Otus trills heard by several members of party and by myself 3 times various nights. Once heard call 3 or 4 times at stream track of camp but could never "call up" nor would birds ever continue calling long enough to locate. Last night at Olomega station heard some notes similar to Otus but rather gruff and changing in pitch low in trees at edge town along railroad track. I kept in conversation with it for quite a while but was never certain that it was actually an owl as the notes came from so close to the ground. Didn't have a light or gun.