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.
Two catfish are distributed throughout Las Cruces streams. The long-whiskered catfish (Rhamdia rogersi) is present in Río Java and several small streams, including Quebrada Culvert and the upstream Quebrada Culebra. The other, the Pencil Catfish (Trichomycterus striatus), I have only caught in Río Java.
Here, minnow traps were used to collect crabs and both species of catfish were caught as by-catch.
Additionally, while we collected the pencil catfish in 2013 and subsequent years, it doesn’t look like I ever published any images—so here are a few old images of Trichomycterus.
Two common, stream-side spiders at Las Cruces. Trechalea extensa is large and hangs out on boulders, dangling it’s fore-legs in the water at night to potentially attract prey, such as small fish. Patricia Esquete’s student’s, Neola and now Macy, have been studying their ecology the past couple of years.
The other spider, probably a nursery web spider (Pisauridae) like this one from Palo Verde, creates a silken tether on a branch and dangles from it, skating on the moving stream surface and likely capturing floating prey as it moves downstream.