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Blog Archives
Tree Sharpening Caterpillars
~30mm long | January 5, 2013 | Panga Ecological Reserve, Minas Gerais, Brazil
What appears to be a flower here is actually a group of caterpillars working their way down a sapling trunk.
They look like they could do a decent job sharpening a pencil, about the same width as this tree(?) trunk.
Side view | Trunk ~5mm wide
Despite the black background, this was taken a few hours before sunset. At the time there was probably a few feet of the trunk left. I marked the location and returned after dark. I found no trace of the trunk or the caterpillars. They apparently ate the whole tree.
I know there are defoliating caterpillars. I know there are wood boring caterpillars. I never imagined there are caterpillars that consume an entire tree though. That’s assuming they eat leaves, which I didn’t observe.
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Yellow/Black Treehoppers with Ants
~5mm | January 7, 2012 | Tupaciguara, Minas Gerais, Brazil
Here’s yet a different species of colorful treehopper. These too were found in association with ants.
A busy photo, but packed with natural history.
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Ants Tending Treehoppers, Poorly Perhaps
~3mm | January 7, 2012 | Tupaciguara, Minas Gerais, Brazil
I had planned to post just a single photo of this scene with ants tending treehoppers. Here we see at least two different colorful treehopper instars, with one actively molting. Ants like the one shown above tended to this small grouping of treehoppers. As I was choosing a photo to post, I noticed something strange about the treehoppers though. Do you see it too?
Look closely and you’ll see that a few nymphs have parasites. I wasn’t sure at first, so I started looking through my other photos. Sure enough, almost every one had one or more parasites. The parasites seem to prefer hiding under the wing pads and below the thorax.
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Membracis Treehoppers and Nymphs
~10mm | January 7, 2012 | Tupaciguara, Minas Gerais, Brazil
When I spotted a group of treehoppers like the one above, I settled in for a while. With such a beautiful subject, I was determined to get some good photos. The shot above is probably my favorite out of around 300 or so shots. I struggled to get something in the background to avoid the usual black background that usually happens with macro flash photos. A black background wasn’t going to serve very well for these mostly black treehoppers.
Not only are the adults pretty, but the nymphs are also attractive in their own way. I prefer the black background here.
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Barklice
9mm long | July 8, 2011 | Victorio Siqueroli Park, Uberlandia, Minas Gerais, Brazil
Because they are gregarious, one rarely sees a lone barklouse. I was surprised to find this one by itself on a leaf. There might have been a group nearby, but I didn’t find them.
Elsewhere in the park though, I did find an aggregation.
Barklice on the side of a tree
Closer view
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Thorn Mimic Treehoppers
10mm long | July 5, 2011 | Victorio Siqueroli Park, Uberlandia, Minas Gerais, Brazil
Treehoppers like this one are sometimes said to mimic thorns. If so, it would have to be a dull thorn, and it doesn’t do it much good hanging out on a leaf. More often though, you’ll find them hanging out together on branches.
Group of treehoppers
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Marimbondo-chap̩u РHat Wasp
July 9, 2011 | Tupaciguara, Minas Gerais, Brazil
The local common name for these social wasps is marimbondo-chapéu in Portuguese or hat wasp in English. The name refers to the form of the nest, seen above.
Seen from below, I’d say it looks more like a sunflower. They are really packed in there. I’d estimate there are probably a couple of hundred of them.
Sunflower?
Here’s another crop that I like of that same image.
A different crop
You’ve probably noticed by now these images were taken during the day. So what are all of them doing hanging out on the nest? Taking a siesta? I wondered the same thing. I spent around 45 minutes taking pictures and attempting to gauge just how closely I could approach without alarming them. During that whole time, not a single one flew off or arrived.
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Ants Tending Leafhoppers
July 2, 2011 | Monte Alegre, Minas Gerais, Brazil
These ants are tending to some treehopper nymphs. Most of the ants are busy collecting honeydew, but the one on the bottom has noticed me and is on alert. I accidentally bumped the branch after this shot and all of the ants started running around looking for something to attack. I held up a leaf for a background here so that the ants would stand out.
In this next shot, I’m assuming the white areas are either treehopper eggs or a protective covering for the eggs. One of the adult treehoppers is also visible here, a darker shade of red than the nymphs.
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Mass Pupation
January 27, 2010 | Caraça Natural Park, Minas Gerais, Brazil
I found one other grouping of exuviae in the area where I found the one above. I’ve never seen anything like this locally. I believe these are from lepidopterans. There is a slight layer of silk on the bark. Up close, I saw some cast off head capsules. Look closely above, and you’ll notice a leg that must have broken off while struggling free.
I know some caterpillars are gregarious as early instars, but I thought they generally went their separate ways as final instars. I thought this was interesting evidence that in at least one species, they pupate and perhaps eclose together.
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Blister Beetles Defoliating
January 31, 2010 | Tupaciguara, Minas Gerais, Brazil
This plant was being devoured by dozens of these attractive blister beetles. Above I’ve caught one with a leaf fragment in its mouth. Below, you can see how they’ve stripped a branch clean. The frass seems to be exiting just about as fast as the plant goes in (must be a good source of fiber).
Beetles Defoliating
As these pictures show, the plant was literally crawling with these beetles.
Working on another branch
The dark backgrounds here are an effect of the camera flash. This was actually happening in broad daylight. How are they able to risk doing that? Blister beetles are so named because they defend themselves with a caustic compound, cantharidin, found in their blood. Predators soon learn to avoid them.
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