Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Patelka
1943
Empidonax difficilis
75
June 21 2mi E Hayfork, 2400 ft., Trinity Co., Calif.
Present in a relatively dense, shaded stand of
yellow pines and Garry oak along the
west slope of Duncan Gulch.
June 22 One male observed and heard
singing regularly in Douglas fir-
yellow pine - Oak forest near the base
of north-facing slope along Hayfork Creek.
June 24-26 1 mi W Hyampom, 1200 ft., Trinity Co., Calif.