Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Behle
1934
Berkeley, California - MVZ UC.
165
aug. 6
6 mi. W. Oroville Butte co. Calp.
aug 6
This rubra race is certainly one
of the most distinctive races of the
species being especially outstanding in
the reddish dark back. The yellow
of forehead, chin and throat in 87
seems constant & irregular unstable
in actria I & fancy the bills are
larger than actria. The range is
limited and I get the impression
is becoming more and more so
with increased cultivation in the
region. One other thing is the
remarkable red soil west of Oroville
and more or less over the wide
area and the close resemblance
of the dorsal coloration of these birds
to the soil. Could selection have operated
to produce this.