Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Remsen,
J.V.
1974
Cliff Swallow
Petrochelidon pyrrhonota
Feb. 16 Los Banos WMA, Merced Co., Calif: 25
Feb. 17 Kern NWR, Kern Co., Calif: 200
Elkhorn Plain, San Luis Obispo Co., Calif: 3 over dry
plains, migrating north.