About 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.
Did You Know?
Thousands can invade a single home seeking shelter, producing a foul odor when disturbed or crushed.
How to Identify Elm Seed Bug
Elm Seed Bug (Arocatus melanocephalus) belongs to the order Hemiptera, family Lygaeidae. Adults typically measure 6-7 mm.
Elm Seed Bug Habitat
Elm Seed Bug is found in underground habitats, particularly across Europe (native), Northwestern North America (invasive). This species has adapted to thrive in its preferred environment, where it can find suitable food sources and shelter.
Elm Seed Bug Diet and Feeding
Elm Seed Bug feeds on seeds and grains. Seed-feeding insects can influence plant populations by consuming seeds, and some play a role in seed dispersal.
Where Is Elm Seed Bug Found?
Elm Seed Bug can be found in Europe (native), Northwestern North America (invasive), where it inhabits underground environments. Its distribution is influenced by climate, food availability, and habitat suitability.
Distribution Map
Where Elm Seed Bug can be found
Is Elm Seed Bug Dangerous?
Elm Seed Bug is generally harmless to humans. It does not bite or sting and poses no significant health risk. Like most insects, it prefers to avoid human contact and will typically flee rather than confront a perceived threat.
Elm Seed Bug Role in Nature
Elm Seed Bug is part of the food web as a primary consumer, feeding on plant material. It serves as an important food source for birds, bats, amphibians, and other insectivores, connecting plant energy to higher trophic levels.
Seasonal Activity
Frequently Asked Questions About Elm Seed Bug
What does Elm Seed Bug look like?
The Elm Seed Bug typically measures 6-7 mm.
Where is Elm Seed Bug found?
The Elm Seed Bug is found in Europe (native), Northwestern North America (invasive) and typically inhabits underground environments.
What does Elm Seed Bug eat?
The Elm Seed Bug feeds on seeds and grains.
Is Elm Seed Bug dangerous to humans?
The Elm Seed Bug is generally harmless to humans. It does not bite or sting and poses no significant health risk.
What is an interesting fact about Elm Seed Bug?
Thousands can invade a single home seeking shelter, producing a foul odor when disturbed or crushed.
Cite This Page
APA:
InsectDiscover. (2026). Elm Seed Bug (Arocatus melanocephalus). Retrieved from https://insectdiscover.com/insect/elm-seed-bug
MLA:
"Elm Seed Bug." InsectDiscover, https://insectdiscover.com/insect/elm-seed-bug.