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Western Conifer Seed Bug (Leptoglossus occidentalis)


Detailing the physical features, habits, territorial reach and other identifying qualities of the Western Conifer Seed Bug.


 Updated: 10/27/2017; Authored By Staff Writer; Content ¬©www.InsectIdentification.org



  Western Conifer Seed Bug  
Picture of Western-Conifer-Seed-Bug


The Western Conifer Seed Bug has spread eastward to cooler climates, but it still consumes the seeds of evergreen trees.





Western Conifer Seed Bugs originated on the West Coast of the U.S., but have migrated east all the way to Atlantic states and provinces. Ground transportation of goods from coast to coast likely helped in spreading their range. They typically prefer warm climates and populations attempt to survive the cold northern winters by entering warm homes and buildings when the seasons change. These small invasions have made them a nuisance to homeowners. Groups of Western Conifer Seed Bugs can enter a house, office building or warehouse in the autumn through torn window screens, open doors and chimneys. Though they aren't known to bite, their presence causes uneasiness to many people.

The primary diet of this species is the soft seed of pine trees, Douglas firs and other cone-bearing trees (hence 'conifer' in their name). They also eat the buds of cones and new needles. They pierce the tender plant parts and suck them dry. This had led to a diminished seed supply in forests, meaning fewer conifer trees are sown that season and new tree growth decreases in that area. This is another reason why the Western Conifer Seed Bug is considered a pest. Many of the conifer trees they eat from are also used by people for lumber and Christmas trees.

A type of Leaf-Footed Bug, Western Conifer Seed Bugs have long bodies and wide, flattened 'thighs'. This species has small spikes on the upper hind legs and a light, white marking across the elytra (wing covering). They are flying insects and are known to buzz while in flight, which can make them easier to find. The bright yellow and black contrasting bands along the sides of the abdomen are highly visible in flight and may lead an observer to first think it is a bee. Like other Leaf-Footed Bugs, it can emit an odor when threatened or crushed; this one's is likened to the scent of pine.
Basic Information
Common Name: Western Conifer Seed Bug
Scientific Name: Leptoglossus occidentalis
Category: True Bug


General Identification
Size (Adult; Length): 14mm to 18mm (0.55in to 0.70in)
Colorwheel Graphic
Identifying Colors: brown, yellow, black, white, orange, red
Additional Descriptors: thick thighs, legs, bands, spiky, flying, harmful,




Taxonomic Hierarchy
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hemiptera
Family: Coreidae
Genus: Leptoglossus
Species: occidentalis




Territorial Reach (A-to-Z)
Note: An insect's reach is not limited by lines drawn on a map and therefore species may appear in areas, regions and/or states beyond those listed below as they are driven by environmental factors (such as climate change), available food supplies and mating patterns. Grayed-out selections below indicate that the subject in question has not been reported in that particular territory. U.S. states and Canadian provinces / territories are clickable to their respective bug listings.
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delware
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming
Canadian National Flag Graphic
Alberta
British Columbia
Manitoba
New Brunswick
Newfoundland and Labrador
Nova Scotia
Ontario
Prince Edward Island
Quebec
Saskatchewan
Mexican National Flag Graphic
Mexico


Territorial Area Map (Visual Reference Guide)
The map below showcases (in red) the states and territories of North America where the Western Conifer Seed Bug may be found (but is not limited to). This sort of data can be useful in seeing concentrations of a particular species over the continent as well as revealing possible migratory patterns over a species' given lifespan. Some species 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.
Alaska  
Hawaii  
Prince Edward Is.  
State of Alabama graphic
State of Arizona graphic
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State of California graphic
State of Colorado graphic
State of Delware graphic
State of Florida graphic
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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


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