Heene, H. 1983 20 July (continued) Both snakes were active on sun-flecked forest litter. At approx 1345 hrs went to 590 m on the Cential Trail, and caught a big female Lachesis muta that Edwin Paniagua spotted this morning. It was coiled near a ridgctop in dense vegetation, approx 1m off trail, w/ head down in coil and facing away from it. Wt. 3.9 lbs, length 2.2 m, the largest venomous snake I've ever caught, and my 7th Lachesis. Like all the others, a slow moving, tranquil snake. Hand storms off and on all afternoon and evening. 21 July