Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Cogswell
1948
Buteo swainsoni
Oct. 16 - 2 mi south of Yountville, Napa Co., Calif.
1 in light phase plumage soaring over
orchards and fields just W of hiway 29
and close enough so that I could see the
light, unmarked area under leading 1/3 of
wing.