Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Cognwell
1948
Aethya valisneria
Nov. 7 - E. side San Francisco Bay, at Berkeley, Alameda Co., Calif.
at least 18 among scamps or muddies on
bay opposite Berkeley Aquatic Park.
1949
Apr. 22 St. Isabel to Golden Gate Fields Race Track, Albany, E.
side of San Francisco Bay, Alameda Co., Calif. - after
being very common all winter all along the shore
here, with maximum numbers of 450 est. here
13, there are today only 47 & 84 in sight.