Pristimantis cerasinus — Horn-nosed Robber Frog
Some other names for this species:
Clay-colored Rain Frog, Limon Robber Frog
Rio Guayabo Trail, Cerro Gaital Natural Monument, El Valle de Antón, Coclé province, Panama—January 9, 2014
This bumpy little frog hopped across the trail in front of Lorrie Smith and me. At first I assumed it was the same species as a small brown frog we had seen a few minutes earlier next to a stream, but a closer look revealed that this one looked quite different. Digging through various references for the area, the best match I could find was Pristimantis cerasinus (tuberculate skin, W-shaped ridge across neck/shoulders, visible spines on heels), but I am far from certain. Unfortunately I was testing out a new camera that doesn't do macro that well, so I didn't get any really good photos that could have helped with the ID.