Gonatodes albogularis — Yellow-headed Gecko
Yellow-headed geckos are active by day, unlike most geckos. Only the males have the yellow heads. I saw three of these, all adult males, on this trip. The other two were too skittish to photograph.
Leenders's field guide spells this species Gonatodes albigularis, but I'm pretty sure that's just a typo.
Esquinas Rainforest Lodge, Golfito region, Puntarenas province, Costa Rica—September 28, 2001
A healthy population of these active little geckos lived on and in the walls of the lodge dining area. I tried to photograph them there, but they were too skittish. This photo is of a specimen that had been captured a little while earlier.
Male (above) and female (below) Gonatodes albogularis look like different species.