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Blog Archives
Caterpillar
13mm long | July 8, 2011 | Victorio Siqueroli Park, Uberlandia, Minas Gerais, Brazil
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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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Mystery Egg Mass
25mm long | July 12, 2011 | Victorio Siqueroli Park, Uberlandia, Minas Gerais, Brazil
What looks a bit like peanut brittle is presumably an egg mass. I found this on lichen covered bark at the base of a tree. Overall it was about 25mm long, which would make each of the embedded eggs less than 2mm long.
Side view
Each egg appears to be elliptical, with a sort of knob at the exposed end.
Closeup
I don’t have a clue what is responsible for this, so I’d love to see comments from anyone that might have an idea. I’ve been through the “Eggs and Egg Cases” chapter of Tracks & Sign of Insects a few times already, but I haven’t spotted any likely suspects.
Posted in Featured Photos
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Leaf-mining Leaf Beetle
8mm long | July 12, 2011 | Victorio Siqueroli Park, Uberlandia, Minas Gerais, Brazil
This attractive little beetle was resting when I found it. Looking at it here, it almost appears to be nature’s idea of a gaudy holiday light display. Just imagine each of those elytral punctures as a tiny LED, and then imagine them programmed so that the dorsal patterns shift down the eltytra, one puncture at a time. Jokes aside, it actually blends in pretty well with the browning foliage.
This is a leaf-mining leaf beetle, so called because the larvae feed between the surfaces of leaves, creating mines. Adults feed on foliage, and it may be responsible for some of the leaf damage visible here, though I didn’t actually see it eating.
Posted in Featured Photos
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Mystery Eggs
Egg, ~1mm wide | July 12, 2011 | Victorio Siqueroli Park, Uberlandia, Minas Gerais, Brazil
These curiously textured and patterned eggs were placed on a dried leaf tip. I don’t recall ever seeing anything quite like them. I don’t know what they are, but I’d guess moth eggs.
Some of the ones around the edge are a bit crumpled.
Edge shot, showing crumpling
Here’s a wider view, to give you some context for the placement.
Wider shot, showing placement
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Chalcid Wasp
5mm long | July 12, 2011 | Victorio Siqueroli Park, Uberlandia, Minas Gerais, Brazil
This is the first time I can recall encountering one of these wasps in the field. Chalcid wasps are easily recognized by their enlarged hind femora.
If you missed the one that emerged from a chrysalis I collected, check out this earlier post.
Posted in Featured Photos
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Parasitic Wasp Cocoon
6mm long | July 8, 2011 | Victorio Siqueroli Park, Uberlandia, Minas Gerais, Brazil
These attractively patterned little cocoons seem to be a common sight no matter where I travel. Each one holds the pupa of a parasitic wasp. I’ll often find what’s left of a caterpillar host nearby. The ones I notice are usually suspended by a thread, as here. That’s not always the case though.
Posted in Featured Photos
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Assassin Bug
July 8, 2011 | Victorio Siqueroli Park, Uberlandia, Minas Gerais, Brazil
This assassin bug mimics a bee quite well. It even seems to have pollen baskets on its hind legs.
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Parasitoid Wasp Emerging
July 8, 2011 | Victorio Siqueroli Park, Uberlandia, Minas Gerais, Brazil
Each one of these eggs from the underside of a leaf was parasitized by a wasp. Â Their barrel shape with round fringed caps suggests they might be stink bug eggs. Had a stink bug nymph emerged, the caps would have been neatly opened. Instead, they each have a roundish hole chewed in them. In fact, there’s a parasitoid wasp straggler chewing its way free from the rightmost egg.
I might be seeing things, but you can almost make out the wasp’s body through the transparent egg shell.
View from the other side
I didn’t notice at the time, but a mite came along.
Posted in Easter Eggs, Featured Photos
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Ant Mimicking Spider and Possible Model
July 8, 2011 | Victorio Siqueroli Park
Uberlandia, Minas Gerais, Brazil
These two photos of critters both 4mm long were taken less than an hour apart in spots just a few feet apart. I believe these two are probably a mimic and its model.
I first photographed the jumping spider. I only got a few shots before I lost it. Later I spotted the ant and took quite a few photos. Here I selected one that would show roughly the same pose as the spider.
The area around the rearmost eyes of the jumping spider is darkened to better match the larger black eyes of the ant. The dark spots on the spider’s abdomen are an anomaly though. Maybe this ant isn’t the model after all?
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