Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Hawke, James
1974
Crotalus ruber
0.6 mi E MacHu 1 on road to Observatorio Astronomico
Nacional, Baja California Norte, Mexico
28 March Found one indiv. lying stretched out in middle of
road at 11:40 AM. It was in full sunlight. Air
temp 1/2" above road surface was 27.0 °C. Soil temp
at surface = 36.2°C. The snake's reddish
color matched well the background color
provided by the red earth of the road bed.