Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Remsen,
J.V.
1973
Williamson's Sapsucker
Sphyrapicus thyroideus
July 14 Boca Dam, Nevada Co., Calif. : 1♂ drumming