Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
K Dixon
1950
Empidonax difficilis
May 12. Strawberry Canyon, Alameda Co, Calif. Found nest in groove
in trunk of laurel on W bank of 2nd tributary of creek inside
Botanic Garden south fence. F flushed from nest which
contained 4 eggs, which appeared pinkish from a distance
of several feet. Sketch from memory.
grove 3-4 inches deep & perhaps skittle wide
nest set in depression at bottom of groove
at height 1 3/4' above ground
approximately NW-facing part of trunk.
May 22. Found nest in clump of grass on E bank of brook in
1st draw W Paletty lab. Nest of grass, perhaps
not completed (no eggs); bird making frequent trips to it.
Nest at edge of 3-4 foot drop in steep bank-
(oak woodland).
June 18. Martha & I visited this nest about 6:20 PM; clear, calm.
Nest contained 3 blind young with feather tracts well-developed.
Flycatcher appeared in oak along brook to S and perched
on "inside" of a bough. Bird nervous at our presence,
shifting perch, jerking tail. We moved down toward road
140 feet & bird flew to herbage on W bank, then to nest &
did not reappear (brooding?). The nestlings were
quiet and did not raise heads or move otherwise as
we moved grass aside to look at them.
July 22. Sunny afternoon. In canyon 3:05 - 4:45 pm in area along creek
from pool to E end Botanic Garden. Heard only one flycatcher
of this species call from along 2nd tributary at S fence of
Botanic Garden.