Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
79
Petelka
1946
Empidonax
Oct. 16 El Batel, 5100 ft., Sinaloa.
Two collected and many seen in the
last few days. There are undoubtedly several
species present locally, most of them, if
not all, being migrants.
Oct. 21 Empidonaces very common