Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Marshall 1942
Chordeiles acutipennis
Lake Olmego
7oz Esomiles
March 22 One this sp? flew over canyon in evening very windy.
- See "C. virginianus"
April 1 5 or 6 foraging in a over pines at dawn ½-way down W slope.
Took 2 2229♂ & 2230♀
April 6 2 foraging very high over pine co.
at dusk.