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Mason bee nest box mystery

Posted by nydepot 6 (My Page) on
Sat, Aug 3, 13 at 14:00

I have a mason bee next box hanging in my garden which they do use.

This year, in addition to the mason bees, there is something else nesting in the holes. I assume whatever it is has something further back in the tube and then plugs the hole not with mud but with folded over grass blades. They are a few inches long and extend into the hole, fold over the diameter of the hole and then stick back out, effectively a U shape for each blade. Sometimes they are twisted a bit.

Any ideas what bugs these are?


Follow-Up Postings:

RE: Mason bee nest box mystery

It may be be the grass-carrying wasp. (Yes, I know that sounds as if I made it up, but it's true.) That wasp provisions its cells with snowy tree crickets.

A number of home gardeners here in the northern part of the Willamette Valley who keep mason bee nests have had them nesting in our tubes for several years.

Where do you live?

Look here

Here is a link that might be useful: grass-carrying wasp

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