BugFinder Insects by State Spiders Butterflies & Moths Bees, Ants, & Wasps Beetles All Bugs Videos (YouTube)

Elm Seed Bug (Arocatus melanocephalus)

Detailing the physical features, habits, territorial reach and other identifying qualities of the Elm Seed Bug

Loading SVG image placeholder
Image Credit: Rob C.
Full-sized image of the Elm-Seed-Bug Thumbnail image of the Elm-Seed-Bug
Image Credit: Jenny R.
Full-sized image #2 of the Elm-Seed-Bug Thumbnail image #2 of the Elm-Seed-Bug

The name and large swarming tendencies of Elm Seed Bugs suggest it is dangerous, but the harmless insect is really just a seasonal nuisance.

Updated: 02/01/2022; Authored By Staff Writer; Content ©www.InsectIdentification.org
First sighted in 2009 in counties in Idaho, the Elm Seed Bug is native to Europe and how it came to North America is unknown. It is a relative of Boxelder Bugs and Stink Bugs, and like them, produces an odor when crushed or smashed. What makes them so troublesome is their swarming nature. Hundreds of them congregate and have a tendency to find their way indoors. They do not harm people, or even the tree they are named after, but the infestation inside a home is naturally disturbing. Because adults do not die in winter, they tend to look for warmer places to ride out the cold weather. They also tend to look for cooler environments in the hot summer, so ridding a house or building of them may be a biannual chore.

Government agencies in Idaho and Utah suggest vacuuming (using a Shop-vac or other brand of workshop vacuum) any swarms that get indoors and establishing routine insecticide treatments around the perimeter of an infiltrated house or building. Treating window wells and door frames also helps deter Elm Seed Bugs from using them as entry points. Larval Elm Seed Bugs feed on the seeds of elm trees during the spring and early summer. They are therefore likely to be found in neighborhoods or regions where elms are present. Preventing an invasion is easier than removing one, so raking up and destroying fallen elm seeds and inspecting firewood before bringing it indoors are recommended.

Our thanks to Fred and Jan T. in Idaho for their assistance in identifying this insect.©InsectIdentification.org

Note: The above text is EXCLUSIVE to the site www.InsectIdentification.org. It is the product of hours of research and work made possible with the help of contributors, educators, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at InsectIdentification AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.

General Characteristics

Capability, Shape, Texture/Pattern, Benefits, Dangers
Flying insect icon
Pest insect icon
Smelly insect icon

Taxonomic Hierarchy

Species Breakdown
Kingdom: Animalia
  Phylum: Arthropoda
    Class: Insecta
      Order: Hemiptera
        Family: Lygaeidae
View More
          Genus: Arocatus
View More
            Species: melanocephalus

Identifying Information

Size, Colors, Features
Scientific Name: Arocatus melanocephalus
Category: True Bug
Size (Adult; Length): 8mm to 13mm (0.31" to 0.51")
Colorwheel Graphic Colors: brown; tan
Descriptors: stinky; smelly; swarm; horde; infestation; invasion; cluster; flying; triangle; tree pest

Relative Size Comparison

Typical Size Between 8mm (0.3in) and 13mm (0.5in)
Lo: 8mm
Md: 10.5mm
Hi: 13mm

Territorial Map*

U.S., Canada, and Mexico
State of Alabama graphic
State of Arizona graphic
State of Arkansas graphic
State of California graphic
State of Colorado graphic
State of Delware graphic
State of Florida graphic
State of Georgia graphic
State of Idaho graphic
State of Illinois graphic
State of Indiana graphic
State of Iowa graphic
State of Kansas graphic
State of Kentucky graphic
State of Louisiana graphic
State of Maine graphic
State of Maryland graphic
State of Michigan graphic
State of Minnesota graphic
State of Mississippi graphic
State of Missouri graphic
State of Montana graphic
State of Nebraska graphic
State of Nevada graphic
State of New England graphic
State of New Jersey graphic
State of New Mexico graphic
State of New York graphic
State of North Carolina graphic
State of North Dakota graphic
State of Ohio graphic
State of Oklahoma graphic
State of Oregon graphic
State of Pennsylvania graphic
State of South Carolina graphic
State of South Dakota graphic
State of Tennessee graphic
State of Texas graphic
State of Utah graphic
State of Virginia graphic
State of Washington graphic
State of West Virginia graphic
State of Wisconsin graphic
State of Wyoming graphic
Canadian territory of Alberta graphic
Canadian territory of British Columbia graphic
Canadian territory of Manitoba graphic
Canadian territory of New Brunswick graphic
Canadian territory of Newfoundland and Labrador graphic
Canadian territory of Ontario graphic
Canadian territory of Quebec graphic
Canadian territory of Saskatchewan graphic
Territory map graphic of the country of Mexico
Contiguous United States shape map layer graphic
Prince Edward Is.  
* MAP NOTES: The territorial heat map above showcases (in red) the states and territories of North America where the Elm Seed Bug may be found (but is not limited to). This sort of data is useful when attempting to see concentrations of particular species across the continent as well as revealing possible migratory patterns over a species' given lifespan. Some insects are naturally confined by environment, weather, mating habits, food resources and the like while others see widespread expansion across most, or all, of North America. States/Territories shown above are a general indicator of areas inhabited by the Elm Seed Bug. Insects generally go where they please, typically driven by diet, environmental changes, and / or mating habits.
Site Disclaimer  |  Privacy Policy  |  Cookies  |  Sitemap
Beetle Identification Butterfly Identification Caterpillar Identification Spider ID Fungal Infections on Insects Nursery Web Spider Official State Insects Termite Basics Insect Molting Process Bugs of Tennessee House Centipede JoroSpider.org

2024 www.InsectIdentification.org • Content ©2006-2024 InsectIdentification.org • All Rights Reserved. The InsectIdentification.org logo, its written content, and watermarked photographs/imagery are unique to this website (unless where indicated) and is protected by all applicable domestic and international intellectual property laws. Material presented throughout this website is for entertainment value and should not to be construed as usable for scientific research or medical advice (regarding bites, etc...).Please consult licensed, degreed professionals for such information. By submitting images to us (InsectIdentification.org) you acknowledge that you have read and understood our Site Disclaimer as it pertains to "User-Submitted Content". Images in JPG format are preferred with a minimum horizontal dimension of 1000px if possible. When emailing please include your location and the general estimated size of the specimen in question if possible. Please direct all inquiries and comments to insectidentification AT gmail.com. No A.I. was used in the generation of this content.

©2024 www.InsectIdentification.org • All Rights Reserved • Content ©2006-2024 (18yrs)