What's That Bug? does not endorse extermination

Cocoon
We found this cocoon attached to the underside of a small branch on a miniature Japanese maple in our yard. The photos were taken on February 3, 2005 in Clackamas County, Oregon near the city of Milwaukie at 45 25′ 45"N 122 36′ 26"W, elev. 125′. The cocoon is 35mm long and 18mm at the widest.
It seems that these might be fairly common in our area. About two months ago I saw a bird carry one of them into the yard and break it up looking for some morsel inside. I have not opened the cocoon so I can’t report what is inside, if anything. I intend to do some macro studies of the attachment point in the next few days. Any help identifying the insect will be appreciated.
Michael A. Perry

Hi Michael,
If you leave the Preying Mantis Eggcase where it is, it will hatch in the spring releasing about 200 baby mantids who will begin to rid your garden of unwanted pests.

Daniel,
Outstanding! We have a pesticide-free garden and rely exclusively on natural predators to control unwanted pests. This egg case is a very valuable find and will be carefully preserved until the mantids hatch. Thanks!
Mike

What's That Bug? does not endorse extermination
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