Heene, H. 1988. April 4 (continued) otherwise more or less solid black). After lunch I waded into the river below the Old River Station and searched logs up and downstream -- so other (Chutra longicaudus) scots nor could I see any from the bridge further downstream. Took photos of a swarm of yellow butterflies on a sand/gravel bar -- they periodically exploded at my approach, fluttering back and forth over the river and reminding me of the famous passage in One Hundred Years of Solitude. April 5 Alejandro Sotziano arrived yesterday afternoon, and w/ Sharon we walked out the CCC, CC, Sendero El Suepo, and returned by Holdridge and SO R. Hot and sunny, but it rained hard for 1-2 hours before dawn. At 0840 hr we found a F Bothrops asutus at X 700 ccc, coiled to one side of trail center and facing down it -- as Alejandro pointed out, well positioned to catch a foraging Amaira festiva. It weighs 31.5g, SV 385 mm, tail 38 mm. A silver-gray, almost bluish snake, actually conspicuous on the mainly red-brown soil and leaf litter. I took one photo in situ, and as I circled for a second the snake struck hard toward me, landing in an open coil -- instead of the original tight one. Clearly it was alert. Tried to crawl off, but not too animated, as we hosed it into a