Greene, H. 1990 August 12 at approx 1200h we found #1 in a tight coil against (continued) a small prickly pear, approx 1.5 m from a crevice among small boulders. Snake seemed asleep - jerked alert as I approached for photographs, then slowly crawled up slope over open ground and into the crevice. It moved directly to the crevice, never turning toward me or rattling. The site is high on a slope below rimrock cliffs >500 m above the road. At 1252 h we located #3 sketched out and pointing into the base of a blue gray large agave like yesterday, but <100 m from the previous plant and closer to the road. The plants are in thick low acacia approachable by scattered open areas, perhaps game trail. As we stepped close, he slid a few inches to the side and coiled under dense brush w/out ever rattling, his head pointed at the agave's base. Tucked in among the basal agave leaves, head pointing out, was a bright colored R - 785 +48mm, 308g! I waited approx 20 minutes while Dave drove to his house for a grab stick and net bag, during which neither rattler moved. Light drizzle. When Dave returned I held one leaf apart and gently pulled her out - never rattled. This afternoon we surgically implanted her w/ AVM transmitter 38916, 151.074 MHz, 10g, w/out problems.