Tag Archives: Las Cruces

A quick peek at diversity with a black light

Like the other OTS stations and many other field stations found in Costa Rica, Las Cruces has a black-light + white-sheet set-up to attract nocturnal insects for viewing.  Here’s some quick shots I took last night.

Moth black light - 20130629 - 11

My favorite of the bunch
My favorite of the bunch
Moth black light - 20130629 - 9
Longhorn beetle – Cerambycidae

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Monster Pelecinidae wasp.
Monster Pelecinidae wasp.

Moth black light - 20130629 - 2

Moth black light - 20130629 - 1


Underwater photography

John, an Austrailian visiting Las Cruces, set up his camera on a piece of bamboo to get some underwater shots of fish.  There were a few good ones of characids investigating the camera. He intends on pioneering this method in stream ecology circles.

Rio Java - 20130621 - 5

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Dam along Río Java

Rio Java Panorama Dam - 20130621 - 1The streams at Las Cruces are fairly impacted.  There are a handful of smaller streams (1st-2nd order) that drain only secondary or primary forest, but most of the larger streams run through some abandoned pasture or have some sort of flow management impact like this one.  My students are interested in water quality, so these impacts make for good gradients to survey.

Catfish – Rhamdia rogersi

One of my students, David, is planning to survey fish communities at Las Cruces. I may build a fish identification page here, but we’ll just start by posting some of what we catch here.

This is a long-whiskered catfish (Pimelodidae) called Rhamdia rogersi.  I’ve seen this species in RBAMB and, I think, on La Peninsula Osa.

Long-whiskered catfish - Pimelodidae - Rhamdia rogersi - 20130629 - 7

Long-whiskered catfish - Pimelodidae - Rhamdia rogersi - 20130629 - 1