What bee makes this nest plug?

Nest plugs come in all forms and contain a variety of materials.  The USDA has a pdf of various nest plugs you might encounter.  We know that mason bees use mud and so to wasps- but add them to the nest in a different format.  Other bees use masticated leaf material or a mix of plant materials. Each plug tells a different story.

Click here for a printable page of  different nest plugs

 

mason bee mud plugs

Leafcutter bee leaf plug.

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