What insect made this, and why?

I guess with a sample size of one this probably isn’t known, but what about the two spiders that hatched? Is the original thought that each structure contains a single egg incorrect, or is it analogous to twins in humans?

I remember the OP.

Wow!

I hope they name it after the Doozers from Fraggle Rock.

Thanks, mozchron. I probably would have missed this entirely if you hadn’t updated.

What a delight. And what a surprise to see two this time. That’s still pretty low on the ROI scale, isn’t it?

Yes, excellent bump!

Here’s a Dec 2013 update: http://blog.perunature.com/we-solved-an-amazon-rainforest-mystery-w/video.html
This recent BBC article http://www.bbc.com/earth/story/20160617-forget-webs-spiders-also-make-slingshots-and-silkhenges

Add me to the chorus of those thanking you for the update, mozchron!

Golden Spiderlings Hatch from Bizarre ‘Silkhenge’ in Amazing Video