1983 21-25 February Spent this time in San Jose, Costa Rica. Went to zoo (photographed white lipped peccaries), Museo Nacional, and got export permit. 26 February Parque Nacional Santa Rosa, Provincia Guanacaste, Costa Rica Arrived here after dark. Some rain on the way, but ground dry and hard in the campground - slept under an almost full moon. Awakened at various times by armadillo visits, two park guard horses coming to eat out of nearly garbage can, and (approx 3:30 AM) something that stung me hard (maybe a velvet 'ant')! 27 February Before 0800h watched 2 males, a female, and 2+ juveniles of Gonatodes albogularis moving over approx 2m vertical stretch of trunk of a large tree approx 5m away. Males sit at/heads up (yellow color very prominent) and sometimes wiggle the erected tail tip, which is lighter than the rest. Saw one approach another male, which fled >1m fast when 1st was approx .3m away. These lizards moved in and out of cracks, and were not visible an hour or so later when the sun was hotter. Saw one male Norops cupreus display near the geckoes from a hole on the trunk approx 1.7m off the ground, then a few minutes later chase a female Gonatodes. Had coffee w/ Dan Jarzen and Winnie Hallwachs at their house. He gave us directions to Rincon de la Vieja and a quick walk through a plot of 'evergreen' forest where he most often sees Crotalus durissus - says this forest is