Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
R.E. Johnson
1967
Chestnut-backed Chickadee
124
April 29 Tilden Regional Park, Alameda Co., Calif.
sunny, clear 8AM- Possible nest in rotten base of
limb of Eucalyptus tree, approx. 12 ft. up. One bird entered,
then after delay, left rapidly. The other adult sat in an
adjacent tree 15 ft. away.