Common Potter Wasp vs Elm Seed Bug

Side-by-side species comparison

Attribute Common Potter Wasp Elm Seed Bug
Scientific Name Eumenes fraternus Arocatus melanocephalus
Order Hymenoptera Hemiptera
Family Vespidae Lygaeidae
Size 13-17 mm 6-7 mm
Habitat Underground Underground
Diet Nectar Feeders Seed Feeders
Regions Eastern North America Europe (native), Northwestern North America (invasive)
Conservation Least Concern Least Concern

Common Potter Wasp

A North American potter wasp that builds small globular mud cells on plant stems and twigs. The female suspends her egg on a silk thread inside the pot before sealing it.

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Did You Know?

The egg is hung on a thread from the ceiling of the pot so the larva can begin eating the paralyzed caterpillars below without being crushed.

Elm Seed Bug

A small seed bug native to southern Europe that has become an invasive nuisance pest in the northwestern United States. It aggregates in enormous numbers on and inside buildings in summer and fall.

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Did You Know?

Thousands can invade a single home seeking shelter, producing a foul odor when disturbed or crushed.