There are approximately a zillion species of small brown ground-dwelling frogs in Costa Rica, and at least a dozen in the Monteverde area, so it's not easy to pin down the species from a photograph. I'm not certain that I got this one right, so if you know better please let me know.

Lorrie Smith and I found one of these frogs stream side, amongst the numerous Highland Rocket Frogs.

Mario Urriola of the El Valle Serpentarium identified these frogs (and several more we saw) as Craugastor crassidigitus. I think he said the first one was a female and the second one was a male, but I might have gotten that backwards.