Trap-jaw ants (Odontomachus bauri) patrol a bed of moss and detritus on a tree trunk, jaws wide open. Disruptions to hairs on the inner side of their jaw trigger an explosively fast and powerful closure—check out the size of their head, which houses the muscles responsible for clamping their mandibles inward.
The closure is so powerful that the ant itself is sometimes launched off of the ground. In fact, they use the launch to escape predators.
Don’t worry, they’re unable to hurt humans.
There are all kinds of cool things about this Chrysomelidae tortoise beetle (Hemisphaerota cyanaea) on the internet, including:
And look closely… there are POLLEN grains all over the little beetles. Can you imagine having hundreds of sticky bouncy-ball-size pollen grains attached to your body and eyes!? The micro-world of biology is fascinating.
Trechalea extensa with an egg sack!
Ctenidae
These flies were sleeping on leaves above Río Java one evening and were cooperative in photographing. I don’t know fly families… so I suppose I’ll just write “Diptera”.
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.
Some results of a night stroll at Las Cruces during the NAPIRE mentor workshop.
Adrea, a recent PhD graduate from UCLA, is mentoring three students in the NAPIRE program with projects on Ithomiin butterflies—a diverse group of clear-winged, neotropical butterflies that form breeding aggregations and tend to roost together. One of Adrea’s students, Katie, is investigating predation risk of roosting butterflies using models of two species that she’s constructed. Here, Katie checks her model butterflies for damage inflicted by predation attempts on the models.
