In 2015, on the last hike of the summer, we came across a jumping pit viper (Atropoides nummifer) and brazenly (or foolishly) photographed, labeled, and finally removed it from the Gamboa trail.
I ran into two Bothrops asper (Fer-de-lance or Terciopelo) on Las Cruces trails (one on Sendero Selva and one on the Water Trail) this year (so far), which is two more than any other year since 2013. Below are a few images of the two.
The only other B. asper I’ve seen in the area was Finca Cantaros in 2013 while batting. The first was a juvenile in a stream bed at Campanario (on the Osa Penninsula) in 2008 that we (at least Oscar Rocha and Mike Monfredi) encountered while walking upstream.