Greene, H. 1987 26 July (continued) The head swilling back and forth -- at least twice I saw it bite and briefly hold on to the plastic box of which I restrained it. I did not experience flicker fusion of the bright bands, but repeatedly found it impossible to distinguish head and tail when the snake was moving rapidly. at ~2030 hr Dave Hardy found an adult Bothrops asper coiled w/ head hanging out over the outer body loop, facing the boardwalk and completely out on the cleared trail at CE 5 200. He took photos, then returned for several of us, and when we approached the snake slid into the forest edge. It crawled around a buttressed tree, several times turning to face us w/ an S-coil -- and once this was from under a large hanging palm leaf such that a pursuer would have been ambushed. Movements were frequently jerky, and involved sudden, sliding changes of position and direction. 27 July Left after lunch for San Jose. 28 July Presented seminar (in Spanish) at the Instituto Clodovis Picado. 29 July Montverde, Provincia de Puntarenas, Costa Rica Arrived here ~1600 hr and got a room in the Pension Quetzal, run by Bob Lewis. Carmen Rojas and I rented a Toyota Land Cruiser from the OTS for $200 for the ride, and we needed the