3.R. MOON 1987 Species Account Chuckwalla (Sauromalus obesus) 15 May Mine south of windy Point, Bristol Mountains, San Bernardino co., CA. Bruce and I saw several chuckwalls on the dark rocks along the base of the Bristol Mountains (I saw one ; Bruce saw 5). The lizard I saw was wedged in between two large rocks below the mine shaft. For the small area we covered, The chuckwalls seem very abundant locally. It was mostly overcast with high clouds ; about 1550 PST ; warm, ~30°C when we found the lizards. 16 May Granite boulders at mouth of Quail Spring Basin approx 1 mi. south east of Arrowweed Springs road, Providence Mountains, San Bernardino co., CA. I saw a large Chuckwalla run over a large granite boulder and down its south face into a crevice. The lizard was scared out from behind the boulder covered hillside north of the dirt road into the basin by a Bobcat that car to and hid behind the boulder. Sunny with a few high clouds & occasional wind ; ~27°C; approx. 1430 PST. Creosote-scrub, loamy soil at edge of bouldery hillside.