What's That Bug? does not endorse extermination

Subject: Strange egg case?
Location: Clayton, ca
October 7, 2012 1:59 pm
Hi, my dad found this strange egg sac in one of his plants about a month ago. Whatever left it also seemed to weave the leaf together. Any idea what left this behind? Thanks!
Signature: Sincerely, Jared

Unknown Leaf Nest

Hi Jared,
The pleating of the leaf in your photograph is most unusual and not something we recognize.  We are posting your photo and inquiry in the hopes that one of our readers will recognize this nest.  We are also contacting Eric Eaton to see if he has any opinion on the potential architect of the nest.

Eric Eaton Responds
Hm-m-m.  The silk structure looks “spidery” to me, like an overnight retreat for some kind of hunting spider.  I think the accordion pattern of the fused leaf is something else going on that is unrelated.  The spider just took advantage of the nook created.

What's That Bug? does not endorse extermination
Location: California

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