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Home » Guide » Arthropods (Arthropoda) » Chelicerates (Chelicerata) » Arachnids (Arachnida) » Spiders (Araneae) » Unidentified Spider Egg Sacs, Webs, Retreats, and Droppings
Photo#454249
Spider Egg Sac
Copyright © 2010 Ken

Spider Egg Sac
Chester County, Pennsylvania, USA
September 7, 2010
Size: approx 7mm
Originally submitted as: Cocoon ?
Found in the underbrush along a grassy trail in southeastern PA.
tag · login or register to post comments
Contributed by Ken on 12 September, 2010 - 8:17pm
Last updated 28 October, 2010 - 12:32pm

Moved
Moved from Spiders.
… Charley Eiseman, 10 October, 2010 - 8:56am login or register to post comments

 
For my own edification...
I was looking at the photo and wondering if I would have figured it out as spider or not; that I might have thought it was one of those wasp "nests" as per:

But the spider silk looks softer, whereas wasp silk looks more wiry, certainly other differences as well, which would be what?
Thanks you.
… MJ Hatfield, 15 February, 2023 - 10:21am login or register to post comments

 
Bundles of braconid cocoons...
...don't have this tufted texture, and they are uniform in color (this egg sac has gray tips on some of the tufts). Those are a couple of the more tangible details that come to mind.
… Charley Eiseman, 18 February, 2023 - 10:45am login or register to post comments

Moved
Moved from ID Request.
… john and jane balaban, 10 October, 2010 - 8:33am login or register to post comments

Charley may recognize it.
Let's wait to see what he has to say.
… john and jane balaban, 12 September, 2010 - 8:53pm login or register to post comments

Looks to us like a spider egg case
Was there a spider nearby? Maybe Tetragnatha?
… john and jane balaban, 12 September, 2010 - 8:40pm login or register to post comments

 
Spider egg sac, yes...
I don't think it's Tetragnatha--those egg sacs are elongate with yellowish green tufts, and this one is more or less spherical. (Well, that goes for T. elongata, anyway; it could well be another species, I suppose.) I see this type a lot, and have collected them a few times but have yet to have any spiderlings come out.
… Charley Eiseman, 12 September, 2010 - 9:20pm login or register to post comments

 
Nearby spider
I didn't see one, but I didn't do a careful search for one.
… Ken, 12 September, 2010 - 8:48pm login or register to post comments

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