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Blog Archives
Lynx Spider Guarding Egg Sac
~10mm | January 7, 2012 | Tupaciguara, Minas Gerais, Brazil
On the underside of a leaf, an attractive lynx spider guards her egg sac.
Dorsal view
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Chrysalis Surprise
10mm | July 4, 2011 | Tupaciguara, Minas Gerais, Brazil
I collected this little chrysalis while I was in the field the day before I took this photo. I didn’t think I’d be able to get a good photo at the time, and I was curious to see what might emerge. Strangely, looking at this with my own eye, it appears opaque with a silvery and gold surface. With the camera and flash, it appears as above, somewhat transparent and showing what looks like a wing inside. I figured it would only be a short time to see the butterfly that might emerge. Well, I was half right.
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Gold-spotted Orb Weaver
18mm | January 20, 2011 | Armonia Nature Preserve, Limon Province, Costa Rica
This large orb weaver was hanging out in the understory. I believe this might be Eriophora nephiloides. Most online photos for the species show a brighter yellower abdomen. It appears to be quite variable. Here’s a photo of one similar to mine (along with what’s pictured at wikipedia).
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Golden Silk Spiders, Mating
January 19, 2011 | Armonia Nature Preserve, Limon Province, Costa Rica
When I first spotted this female Nephila clavipes, she was positioned rather low in her web. Her background was cluttered and shaded. I prodded her a few times, and as I’d hoped, she retreated to a higher position in her web where I thought I might be able to get a more pleasing background.
Unexpectedly, her quick movements drew the attention of a male that was also hanging out in her vicinity. I’ve read that males prefer to mate when the female is preoccupied with a meal (so they’re less likely to become a meal themselves). Perhaps he mistook her quick retreat as movement toward prey. At any rate, he wasted no time approaching her and getting into a mating position.
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Immature Argiope
January 18, 2011 | Gandoca-Manzanillo NWR, Limon Province, Costa Rica
Closeup crop
Argiope spiders are easy to recognize. They sit head down in the center of their webs with their legs paired up. They don’t even bother to hide themselves during the day. They are among a relatively small number of orb weavers that add a decoration to their web, called a stabilimentum.
The form of the stabilimentum may change as the spider grows. Young spiders like this one may create a dense circular pattern as shown here. Older spiders are more likely to create sparser designs in various shapes.
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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.
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