Greene, H. 1992 October 10 Chiricahua Mtns., Portal, Cochise Co., Arizona arrived here last night in time for dinner, having driven from the Tucson airport w/ Mike Lipske, a writer for National Wildlife magazine. From 0900-1300h we walked over the blacktail study site and located four snakes (Dave Hardy has the detailed notes). I photographed C. molossus #13 under an Opuntia pad & C. molossus #11 basking from under the edge of a small boulder at roadside, foodbidge in the sun. Saw a large Sceloporus clarkei active on a ravine wall. At 1540h and ~1800h I spotted C. molossus #11 still out basking. At 1900h he was no longer visible, and I placed thermocouple leads from a Bailey Bat thermometer, in deep enough to measure shade and in soil x 20 cm out from the entrance to measure sun temperatures. As Sarah Schmidt and I drove down the Paradise Rd. toward Portal, on the east end of the study site, at 1910h we watched seven Tayassu tajacu cross the road: an adult, two young, an adult, two young, and finally a smallish adult w/ dorsal ruff up. October 11 Clear blue sky & warm, as yesterday. At 0850h C. molossus #11 was not visible, temperatures 18.3 C in shade, 19.7 C in sun. At 1043h I saw an active Spilosoma variegatus (and at least twice later this trip, Entanier). At 1130h