Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Cogswell
1950
Chordeiles minor
4
July 7 (cont.)
At least 3 other ? nighthawks were
seen & heard in the same area whence this
? came. The call note given by all these
? by the ? when diving on the ? was the
usual, strident "k-peent"; but the ? was
also heard to utter a recognizable grunt
note, altho it was much softer &
seemingly lower pitched.
July 10
(dusk)
? still incubating 2 eggs on this NEST.
She flew away after a diversionary display.
July 11
(early p.m.)
E. side Boca Res., 5600 ft., Nevada Co., Calif.-another
NEST discovered (by almost stepping on it)
with ? incubating 2 eggs. It is placed on
tan-colored gravel in midst of scattered, gray
deal branches of bushes. The area is a broad
flat covered only with sparse sagebrush
& antelope brush with sparser grass. Open
Jeffrey pine forest is on slopes 1500 ft away.
(cf. activity in this area on eve of June 22).
July 13
7250 ft., ΒΌ mi. N Donner Pass, Nevada Co., Calif.- ?
still incubating on NEST (6th day since 1st egg laid).
July 19
Sugar Bowl Lodge, 7000 ft., 1,2 mi. SSW Donner Pass, Placer
Co., Calif.- 9+ counted over meadow & cleared
ski slopes on N & NE sides of Disney Mtn.
These are the first noted here in evenings,
altho the nesting areas are only a mile
away. They seem to forage over those
cooler, N-facing forested slopes only on
certain evenings, & apparently never early
in the season.