Arenal Night Hike: One Hour in Daylight, One in the Dark

The walk starts before dark on purpose. You get about an hour on the trail in daylight and about an hour after it has gone, so you watch the forest change over instead of arriving once it already has. That matters for what turns up. Sloths and birds, toucans among them, are found while there is still light. Frogs and snakes come out once there is not, and the same stretch of forest works differently in the two halves of the walk. The route is a natural trail through the reserve, and what is hidden in it depends on the night.