The frogs have suckered toes which allow them to climb but they aren't as agile as their tree frog cousins and spend more time on the ground. However, to protect their tiny young, they are hatched and guarded in the water collected in bromeliad plants on tree branches.
You'll see them in other parts of Cahuita too -- look out for them in shadows and wet soil. They are not a species in danger, so they are fairly commonly seen around.
Astonishingly, although it is not the most toxic of the posion arrow frogs, it still contains enough poison to stop a human heart. This toxicity is only released when the frog feels threatened, so don't touch one!
Have you seen these tiny amphimbians on your strolls through La Casa del Mango garden or in town?