We occasionally noticed a bat flying around our lab space but didn’t pay too much attention to it. On our last night however, when it was unseasonably cold, several bats decided to use our lab as shelter. Often when the door opened one would fly in and around and then perch underneath one of our lab benches; five in fact were roosting together there at one point. I didn’t think too much of it until I recalled that bats have some pretty bizarre fly parasites that wander about through their fur. Suddenly this became an opportunity to make a novel entomological find.
Today is a big day: reviewing the available established plant plots in the area, relocating their markers (boundaries of edges and internal sub-quadrats), selecting a plot we will follow in the next few years, and setting up several kinds of traps to capture insects. One of the reasons arthropods are so diverse is because they divide any habitat into 1000s of microhabitats, with many insects specializing on particular aspects – flower feeders, seed drillers, stem and leaf miners, soil arthropods, root feeders, parasites, parasitoids, predators….an insect specialist must h
post by Malena Vilchez, of the Peru research team
The Gyrinidae are a family of charismatic aquatic Coleoptera commonly known as whirligig beetles, for their gyrating swimming style. Gyrinids are peculiar for having completely divided eyes giving them the appearance of having four eyes: two that peer above the water and two that peer below the water. They swim about on the surface tension of the water kicking with two pairs of paddle-like legs.
After our rain day on Tuesday, we finished off the last two days of the main expedition by driving a circuit from Biscucuy to Trujillo, and then winded out of the Andes in the state of Lara and back to Maracaibo yesterday evening. The rain was a bit more widespread than I had hoped, and the condition of many of the rivers was less than exceptional for collecting—recent rain also can throw off our water chemistry readings. Nevertheless, we still made good progress and had a few surprises.
Mauricio, Jesus and I scouted a few new field sites today in the Serrania de Perija- the mountainous border region that forms the western boarder with Colombia. Just a few hours from the relatively affluent oil city that is Maracaibo, the roads gradually narrow into small dirt paths winding around large rural haciendas (ranches) and indigenous communities. Cars give way to burrows and horses as the primary (and functional) means of transport.