Mallard notes, v4295
Page 243
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
Mayhew 1958 Nov. 15 Journal 120. 4.5 mi. W. of 1000 Palms, Riverside Co., Calif. night was 11.1°C. (52°F.). This morning at 0830 the air temp. was 13.4°C., the soil surface temp. was 18.5°C., the rel. humidity was 42%. As it was so windy and cool out, we didn't leave the car to look for animals until 1030. (Altitude according to altimeter here at "Granddaddy Dune" is 810 ft.) At this time the air temp. is 14°C., soil surface temp. is 21.4°C., rel. humidity is 38%. Sand on the lee side of a dune, however, has a much higher temp. For example, at 1050 we measured air & surface temp. on the S.E. side of a dune that is about 6' high and covered on top with creosote bush. The air temp. was 18.6°C., & the surface temp. was 41.8°C. Only 2 lizards were seen while we were looking - both junior Uma inornata. They were on the surface on the lee side of their respective dunes. The first was seen at 1100, the second at 1140. The weather was so bad & the lack of animals so discouraging, we quit looking at 1145. We probed as much as 4 inches below the sand under many bushes without finding a thing. We reached UCR at 1305 after a total of 351 miles covered on the trip.