Mason Bee House trays

Asked June 8, 2016, 4:18 PM EDT

I found what appears to worms nesting my mason bee house trays. Wonder what species they are and if they are infact worms

Washington County Oregon

2 Responses

We are consulting other experts on the identification of this larvae. We will provide an answer as soon as possible. Thank you for using Ask an Expert!

Thank you for your patience. Larval identification is difficult!

Experts at Utah State University and Oregon State University agree that it is larvae from the potter wasp (also called a mason wasp) (Vespidae: Eumeninae). They prey on caterpillars.

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