Greene, H. 1989 May 5 Briones Regional Park, Contra Costa Co., California Took a Zoology 107 field trip here, from 0800-1200, on a beautiful warm, sunny day. Water in all four lagoons (we came in from the Alhambra Valley Rd. side), but three of them heavily trampled by cattle. Saw 3 Pituophis melanoleucus (all adults above ground in open grassland), 1 juvenile Coluber constrictor, 1 juvenile Thamnophis elegans, and 1 adult T. couchii (requisitated fastwater). Also heard Hyla regilla, caught juvenile Rana aurora, saw numerous Scelopous occidentalis and counted 16 Clemmys macrocata basking in the fenced Sirdsich Lagoon. May 6 Repeat of yesterday's trip: 1 Pituophis melanoleucus (same stub-tailed animal seen yesterday), 2 Coluber constrictor (1 ad., 1 juvenile), 4 Thamnophis couchii (1 ad & from Upper Sirdsich requisitated a Taricha), plus lizards and turtles and frogs. June 4 Portal, Chiricahua Mtns., Cochise Co., Arizona Arrived here ~1330hr w/ Claudine Juke, having left Berkeley on the 1st. Visited Howard Lawton in Tucson, who said he has seen Crotalus atrox, (C. tigris, and Phyllodryphus browni on the roads lately although there has been no rain. I visually located the adult ♀ Crotalus molossus (we have been radiotracking since last August) high on the slope where it's been all winter. The snake is in a hole within a crevice, under a flag