Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Remsen,
J.V.
1974
Swainson's Hawk
Buteo swainsoni
Apr.26 Boca Dam, Nevada Co., Calif.: 2 - unusual location and altitude.
May 15 Woodland Sugar Ponds, Yolo Co., Calif.: 1 ad.-dark phase.