Berkeley and La Jolla field notes, v4474
Page 20
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
and black head with white cheek patches. The most numerous ducks were the mallards - more numerous than all the other forms together. They were in summer plumage, males and females being very much alike. Two large ducks were not identified. Across the lake near the waters edge a number of pelicans were seen. Crossing the bay two species of gulls were observed, - Larus occidentalis (western gull) and Larus heermani (Heerman gull). The first is slightly larger than the second and may be distinguished from it by color ation as seen in flight. The mantle is a dark slate color while in the case of the Heerman, the bill is bright red and the head and upper neck are white. The horizon was in all 30-35 species.