Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Remsen,
J.V.
1974
Swainson's Thrush
Catharus ustulatus
May 9 Kelso, San Bernardino Co., Calif.: 1
May 13 Big Morongo Refuge, San Bernardino Co., Calif: 10 - migrant pulse.
Tip Top Mtn, San Bernardino Co., Calif: 1 in pinyon-juniper woodland.
Jun. 3 Oasis Ranch, Mono Co., Calif: 2. Late migrants seen here and several other spots June 1-3
June 17 Tilden Park, Contra Costa Co., Calif: 10 h.o. (s) - most common bird - steady outpouring of songs. One individual sang a very different song in addition to a normal song. - "cheeee cheeeee cheeew cheeau cheau" downsurred would sing 4-5 normals and then 4-5 weird ones.