Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Redhead
Aythya americana
Remsen,
J.V.
1973
July 8 Woodland Sugar Ponds, Yolo Co., Calif. : 12 (9♂♀)
July 14 Boca Dam, Nevada Co., Calif. : 1♂
Woodland Sugar Ponds : 20, mostly ♂
July 21 Whiteater Rivermouth, Salton Sea, Riverside Co., Calif. 250
Sep.14 North end Salton Sea : 1 ♀-plum
Oct.20 Furnace Creek Ranch, Inyo Co., Calif. : 1♂ + 1♀