Greer, H. 1985 4 August (continued) rattling, and efforts to seek shelter rapidly. Wondered if rattling for them serves as a "pursuit invitation signal?" At 1513 hr, just as we were coming back from above to Ash Springs, through heavy woods, I heard sounds in the leaves behind me. Turned to see a ~80 cm Pituophis melanoleucus crawl rapidly across the trail and try to ascend an oak. After I'd seized and examined the snake, it readily ascended the tree to ~3 m. All along the trail, up and down, we saw lizards - several each of Sceloporus jarrovii and S. virgatus and 1 S. clarki. After dinner went road hunting w/George Middleton. I trip up and down Cave Creek Canyon and two out to ~5 mi S. of the Portal store on the flat top to Roder. Saw 2 juvenile Crotalus scutulatus and 1 juvenile C. atrox, and surprisingly, an adult C. lepidus AOR at 0.6 mi S. of the Portal Store in mesquite. Snake was ~35 cm total length w/ an empty stomach, crawling from the east side of the road (Mesquite, Cave Creek) toward the west, which is more open and has a hill with cliffs ~1/4 mile away. Torberlin proposes the snake was washed down out of Cave Creek Canyon in a large flash flood a few days ago.