Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Remsen,
J.V.
1974
Magnificent Frigatebird
Fregata magnificens
June 17 North end Salton Sea, Riverside Co. Calif: 2 white-headed immatures circled slowly from water's edge in thermals until lost out of sight. Never once flapped wings.