Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
238, 239, 241, 285-291. 1952: 20, 21, 47, 50-52, 55,
R. Zweifel
Mar. 1, 1953
206
Rana boylii
Arroyo Mocho, 4 1/2 mi SE Livermore, Alameda Co. Calif.
4:45 AM - large adult ?, water 9.4°C
10:00 AM - adult ? - water 9.0°C
549.0
Stream average 10' wide, 8" deep - some pools up to 2'. Watercourse lined with Baccharis rimosa. Valley perhaps 1/4 mile wid at this point. Sycamores scattered along stream, occasional valley oaks elsewhere. Practically no shading on stream.
Arroyo Mocho.
549.6
Water 10.5°C (young frogs, not cared).
Frogs very scarce today throughout the Arroyo. Snow fell last night on nearby ridge and temperature was probably close to freezing last night. Rain & later snow fell as we left in the late afternoon.