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Blog Archives
Mating Snout Beetles
2mm | January 17, 2011 | Cahuita National Park, Limon Province, Costa Rica
These beetles are tiny. Each one is only a few millimeters long.
Posted in Featured Photos
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Army Ant Week Post #3
January 23, 2003 | Rincón de la Vieja National Park, Guanacaste Province, Costa Rica
OK, I admit it’s not a great photo. What I was trying to show here though was how thoroughly the army ants at the raid front carpet an area, looking for prey. They go in, under and over everything. I usually just step over the raid trails when I encounter them. In this case though, they were very thoroughly blocking the trail I was on. I eventually tip-toed through them, followed by some vigorous foot stomping.
Seeing a raid front really is quite a spectacle though. There are often antbirds flitting around, and it’s amazing to see all the stuff that the ants scare from the leaf litter. I’ve been surprised by just how many hidden critters are suddenly forced into revealing themselves. As potential prey flees the ants, you can’t help but notice how some are immediately set upon by parasitic flies.
Posted in Featured Photos
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Army Ant Week Post #2
July 20, 2006 | Ilhabela, Sao Paulo State, Brazil
These two photos are from my first trip to Brazil. I spent a week on the island of Ilhabela, a few hours drive from Sao Paulo.
I probably wouldn’t even have noticed these ants if not for the calling of antbirds. The birds were making quite a fuss so I moved in to investigate. That’s when I started to hear a light rustling noise and then noticed the ants carpeting the leaf litter. The rustling is not just the ants, but all of their potential prey trying to escape.
Below, they’ve managed to overwhelm a spider, er, well, actually just a shed spider skin. Honestly, I always believed this was a captured spider until reviewing it yesterday when I noticed something was off.
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Silver Argiope with Wasp Prey
January 27, 2010 | Caraça Natural Park, Minas Gerais, Brazil
This spider was on an exposed ridge overlooking the sanctuary. She appears to have caught a nice sized wasp.
This species often creates an X-shaped design (stabilimentum) in their web, and you can just see a hint of one extending to the lower right.
The common name Silver Argiope is consistent with the scientific name (argentata = silvery). Even the common name in Portuguese, Aranha-de-prata, translates as Silver Spider. It is indeed silvery.
Posted in Featured Photos
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Identification Challenge #4 Reveal
As Ted C. MacRae correctly guessed, the chrysalis in the latest identification challenge yielded a specimen of Papilio glaucus, an Eastern Tiger Swallowtail.
April 25, 2010 | Twelvestones, Roswell, GA, USA
The blue on the upperside of the hindwings indicates this is a female. Here’s the underside of the wings:
Underside of wings
If I’d had some daylight, I’d have tried to get something other than a black background. I saw she had emerged after arriving home one evening though, so I took these shots in my home office before releasing her.
Being a fresh specimen, I thought I’d try for some closeups of the wing scales.
Posted in Identification Challenges
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Some Army Ant Observations
January 27, 2010 | Caraça Natural Park, Minas Gerais, Brazil
That’s the general scene. I encountered these army ants on the side of the trail towards the end of the afternoon. The odd thing is that I didn’t see much more than what’s shown here. There were a couple of holes in the ground, outside the shot above, but roughly in the upper left and lower right. Despite some searching in the nearby vicinity, I didn’t find any other ant trails. But there were ants streaming in and out of the two holes, forming roughly two paths. The bottom path was moving to the right and the top to the left.
Posted in Featured Photos
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Mating Wasp Mimics
January 28, 2010 | Caraça Natural Park, Minas Gerais, Brazil
Normal disclaimers apply (flies are difficult to identify), but these mating flies might be a Systropus species.
Did you think they might be wasps? They are almost certainly wasp mimics.
Don’t be fooled by what appears to be an extra wing on the one to the right. That’s just a trick of the camera.
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Paper Wasps and Parasitoids
January 26, 2010 | Caraça Natural Park, Minas Gerais, Brazil
When I spotted these paper wasps alongside the trail, I only halfheartedly took a few shots. Mostly, I just didn’t think I’d be able to get an attractive photo out of it. So when I was reviewing my shots, I just about deleted all of them, including this one.
At the last second though, I noticed something unusual in the photo. I call these sorts of discoveries where I notice something in the photo that I didn’t realize was there when I took it “easter eggs.” It happens often enough that I just decided to add a new category for that here on my blog.
Posted in Easter Eggs, Featured Photos
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Globular Stink Bug Invasive
This post’s featured creature is Megacopta Cribraria.
August 5, 2010 | Twelvestones, Roswell, GA, USA | ~5mm
Just outside the entrance to my subdivision, there’s a stand of kudzu, Pueraria montana var. lobata, at the border of a city park. If you’re not familiar with kudzu, it’s a major invasive here in the Southeast that pretty much takes over wherever it manages to take root. Many of the volunteer outings with the local nature conservancy are focused on eliminating this invasive from conservancy lands. Here are a few photos of the area to give you an idea.
Posted in Featured Creatures
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Late Summer Luna Moth
Twelvestones, Roswell, GA, USA | August 22, 2010
I spotted this luna moth while returning from a walk in a nearby park. It was at the base of some landscape timbers, maybe having just eclosed. I coaxed it onto a finger and brought it home. I picked these grass blades as a perch and took a variety of photos.
After dark I found a spot where I could get the nearly full moon in the photo. There’s no way to get both the moth and the moon in focus at the same time, so I simply took one photo with the moon in focus and another with the moth in focus, and then combined them digitally.
Posted in Featured Photos
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