Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Pipistrellus hesperus-
July 9, 3 mi. S Shurz, -100ft., Mineral Co. Yes.
Shot as flying around trees shortly after
sunset - They are fairly numerous here
among the Cotton wood trees and especially
along the river - a few are out hunting
well before sunset! Most numerous
shortly after sunset.