Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Cogswell
1950
Hylorchla guttata 4
July 23 High Meadow, 7800 ft., to upper border of "Canadian zone" (red fir - silver pine belt) 5 at 9000 ft., Carson Range, Eldorado Co., Calif. - 3 heard singing in 1 hr. 20 min. of hiking up a steep trail.
July 27 E. slope "Signal Hill", 7100 ft., 3/4 mi. W Donner Pass, Placer Co., Calif. - 1 singing a nearly full volume song from midst of dense thickets of bitter cherry, willow, Ceanothus velutinus, etc. -- i.e. in "chaparral" more typical of wintering habitat of some subspecies.
July 20}
{July 31} near Sugar Bowl Lodge [see p. 7] - 1 or 2 singing birds still to be found at dawn & dusk;
but others have apparently ceased singing
Aug. 3 I came up in mtn. alder thicket & lower
conifer branches in forest N of lodge
when a large group of small birds was
gathered scolding my owl call. The
thrush called "chuck" only.
Aug. 25 "chuck" calls heard near this same
spot. No Hermit Thrushes have been
seen or heard in the region we covered
in August.