Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
K.Selander,
1952
Chordeiles acutifennis
July 22 35 mi. SE El Entroque, 5000 ft., Durango, Mexico. - at
8:30 A.M. a lone bird flew slowly over camps and
continued along edge of river bed, sky fairly clear
and bright.