Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
R. Zweifel
June 15, 1953
94
Rana boylii sierrae
Camp Cornell 4000' Calaveras Co., Calif.
Seven frogs were taken from what I consider an ideal Rana boylii stream.
The stream is swift running, average 12-15'
in width and has a few pools up to
2 1/2' deep. Some places where the stream
is on bedrock, there are sloping banks
of the granite bedrock, or which the frog
were found. At other places they were
on the sandy or rocky shores, or as
rocks in the stream.
This is an typical Season Transition
Life-Zone forest. Trees present include
incense-cedar, Douglas-fir, yellow
pine, sugar pine, white fir, black
oak and alder.
All exhibited the typical "sierra-stripe"
when caught. In some, the yellow of
the ventral surface looks very much like
that of R.b. boylii, but tends to be
evenly distributed over the ventres (except
the throat), not concentrated on the
grain.