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Posts Tagged ‘Tenodera sinensis sinensis’

As I was exploring Occoquan Regional Park last week with fellow dragonfly enthusiast Walter Sanford, he pointed out a foamy-looking mass attached to the branches of a bush and asked me if I knew what it was. My first thought was that it was some sort of cocoon, but I had never seen one that looked like this. Walter informed me that it was an ootheca and when I continued to look at him with a blank stare, he explained that an ootheca is an egg case for a praying mantis, in this case most likely a Chinese mantis (Tenodera sinensis sinensis).

I did a little research on-line and learned more about oothecae in an article on the Thoughtco.com website.

“Soon after mating, a female praying mantis deposits a mass of eggs on a twig or other suitable structure. She may lay just a few dozen eggs or as many as 400 at one time. Using special accessory glands on her abdomen, the mother mantis then covers her eggs with a frothy substance, which hardens quickly to a consistency similar to polystyrene. This egg case is called an ootheca.”

Several articles warned readers against collecting one of these egg masses. Apparently indoor heat may cause the tiny mantises inside to think it is spring and you may suddenly find yourself with 400 new additions to your household.

ootheca

ootheca

© Michael Q. Powell. All rights reserved.

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