Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
104
Bombycilla cedrorum
Nov. 10 Casita, 40 km. S Nogales, 3300 feet, Sonora.
A flock of about 20 observed wheeling over open Cottonland willow timber.
Fall records from Sonora are lacking,
probably, as Van Rossem (1945: 210) states, due to
lack of observation at this season.