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Photo#41078
An Alien-looking Coocoon... - Mantis religiosa

An Alien-looking Coocoon... - Mantis religiosa
Petaluma, Sonoma County, California, USA
December 22, 2005
Size: 1.25"L, 3/4" W, 5/8" Tall
I found this as we were cleaning a woodpile at a construction site. The 2X4 had been there no longer than a month. The weather was what it was in December...and I'm wondering what will erupt out of the shell, sitting on a table in my dining room.

Images of this individual: tag all
An Alien-looking Coocoon... - Mantis religiosa An Alien-looking Coocoon... - Mantis religiosa

Moved

Moved
Moved from Mantidae.

It appears to be the ooth of
It appears to be the ooth of the european mantis.

A Syrphid larvae
I think this would be a syrphid larvae.

regards,
Bastiaan

 
ah! the english system of units
This is actually more than 3 cm long.

Looks like it might be
an egg case from a mantid, see among others in the guide, Some of the experts here might even be able to tell you which one! We'll be curious to see what they say.

 
Mantid ootheca.
This is indeed a mantid ootheca, though I'm unsure which species. Moving to guide page for the family.

 
And be careful
You don't want a lot of baby mantis crawling all over your house :-)

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