Smilisca sila looks a lot like its sister species Smilisca sordida, whose range also encompasses this area. S. sila has a blunter nose and somewhat bumpier skin, along with some other minor differences in appearance. Mario Urriola of the El Valle Serpentarium identified this photo as S. sila, which he said was the common treefrog in this area.

The next night Lorrie Smith and I went out hiking with Mario, and together we saw several types of frogs, including a dozen or so more Smilisca sila.