Entomology (Study of Bugs)/egg sack

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Question
I ordered praying mantis egg sacks for my son's class.  They were delivered in the mail yesterday and I was not aware of it as they should have been delivered to my door. They were out in the mailbox overnight with below zero temperatures.  Are they able to handle these kind of cold temperatures?  Thank you for your input.

Answer
Heather:

They should be fine, as the eggs are encased in a foam-like substance that the female secretes to insulate the eggs from just these kinds of conditions.

That said, the supplier should have given an approximate window of when to expect them to emerge, and/or a guarantee for any egg cases that do not hatch.

Eric

Entomology (Study of Bugs)

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Eric R. Eaton

Expertise

I answer insect and spider identification questions ONLY. Attach images if possible. No "what bit me?", "what do I feed this bug in captivity?", or science fair project questions please. NO TECHNICAL QUESTIONS ABOUT INSECT PHYSIOLOGY.

Experience

Principal author, Kaufman Field Guide to Insects of North America. Professional entomologist employed previously at University of Massachusetts, Chase Studio, Inc., and Cincinnati Zoo; contract work for West Virginia Department of Natural Resources, Smithsonian Institution, and Portland (Oregon) State University.

Publications
Author, Kaufman Field Guide to Insects of North America, Missouri Conservationist magazine, Ranger Rick, Birds & Blooms, Timeline (journal of the Ohio Historical Society). I have contributed to several books as well.

Education/Credentials
Oregon State University, undergraduate major in entomology, did not receive degree.

Awards and Honors
One of the top 50 experts in all categories for AllExperts.com, 2009.

Past/Present Clients
Principal author of the Kaufman Field Guide to Insects of North America, Smithsonian Institution (contract), Cincinnati Zoo (employer), Portland State University (contract), Chase Studio, Inc (employer), Arkansas Museum of Discovery (guest speaker). Currently seeking speaking engagements, leadership roles at nature festivals, workshops, and ecotours.

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