Greene, H. 1987 14 July (continued) that our presence caused it to move, but I think that unlikely because of its behavior (apparent searching, not flight) and the fact I've had no evidence of such effects w/ this Lachesis or others in the past. Can wondered if it was bothered by the rain (water had pooled under the Danaea), but it has rained many times in the past w/out this or other Lachesis moving. 15 July Spent the morning preparing a receiver and transmitter - ch 3, 27.575 (frequency). Temp. calibration (beats/0.0 sec) 26.4 C, 92; 30.4 C, 111; 32.8 C, 124; 33.6 C, 134; 37.0 C, 154. Processed the snake right after lunch: SV 1370 mm, tail 144 mm, 1.8 kg. Snake never got especially riled up, but while we were measuring it protruded and retracted one hemipenis. Just as we finished it spontaneously evacuated a large fecal and uric acid mass, both very wet. Spines of Proechynus (or less likely Heteros) are clearly evident. Less than an hour later we released it on the Danaea fern, and its responses to gentle prodding w/ snake stick were to crawl or to cover its head w/ a coil and elevate and gently sinuously wave the tail, while periodically (>= 3 times) extruding and retracting the hemipenis. Then we walked out to Sendero