Heane, H. 1990 f: 165 Kg (spine shows, not thin), 1750+230 mm (TL/98m) (spine missing) March 27 with freq. 15/.315 MHz to a Telonics at (continued) 15/.270 (originally .250). The previous unit seemed to have slipped external to the ribs and was easily visible as a lateral bulge, but the incision had healed perfectly and there was no evidence of any problem. I made a new incision at the posterior end, removed the old unit without difficulty, and put the new one in the same hole. I had difficulty getting under the ribs, but there was little bloody. A visiting MD from Puerto Viejo closed the two incisions with dissolvable sutures -- took the snake approx 2 hrs to regain movement, but by after dinner she seemed OK. After dinner David Wallace and I walked to approx 500 m on the CES and saw only a juvenile Hyla rufitela, then through the Carlisana Swamp - virtually no frog activity, but I found a small adult Leptodeira septentrionalis lixj along a small vine or limb (d approx 3cm) approx 0.5 m above the slope on its E side. Coming back in on the SOR David spotted an echymised rat in a sturdy hollow tree trunk. It had distinct [an erect- fright?] posteriorly spirose fur, a white belly, and a vagely tricolor tail. Dorsum grayish brown, tending to lighter on the sides. I guess it was a 250g rat. While we watched it began to eat from what looked like a small group of Welfia