Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Cogswell
1949
Dendroica nigrescens
1.
Apr. 9 - S. Fork Tuolumne River, 1800 + alt., Tuolumne Co. Calif.
In a little side canyon along road line, with
live oak, blue oak & digger pines as habitat, one
? of this species was singing. A few yellow
pines were nearby.