Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Cogswell
1949
otus asio
2
(2 1/2 mi. NNW) Red Mtn., 5300 ft., 14 mi. S Hayfork,
Trinity Co., Calif.
Sep. 7 - 1 a.m. - (See journal account of observation of
what was probably an individual of that sp.)
Sep. 8 In the early evening, but well after dark,
one was calling the regular tremolo call
of this species from the cedar-fir trees of
our camp ground. It became silent (or left
the area?) when I tried to go closer to it.