Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Remsen,
J.V.
Black Swift
Cypseloides niger
July 6 Ano Nuevo Pt., San Mateo Co, Calif: 5 silent birds seemed to flew to and then later from some natural arches on south side of the point. Joe Marlan had noted this behavior earlier this summer, suggesting this as a possible nesting site.