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The western conifer seed bug, Leptoglossus occidentalis, sometimes abbreviated as WCSB, is a species of true bug (Hemiptera) in the family Coreidae.It is native to North America west of the Rocky Mountains (California to British Columbia, east to Idaho and Nevada) but has in recent times expanded its range to eastern North America, to include Connecticut and New Hampshire, and has become an ...


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 are not known to bite, their presence causes uneasiness in many people. A type of Leaf-Footed Bug, Western Conifer Seed Bugs have long bodies and wide, flattened 'thighs'.


This is a native Western Conifer Seed Bug, not a Kissing Bug. The Western Conifer Seed Bug has greatly increased its range beginning in the 1960s when it began to be reported outside of the Pacific Northwest. It now frequently enters homes to hibernate in the northeast and beginning in the early 2000s it has been reported in Europe as well.


The western conifer seed bug’s consumption of Douglas-fir seeds and seeds of various other species of pine results in a substantial loss of seed crop. Thus, its direct economic impact is a reduction in the quality and viability of conifer seed crops.


The western conifer seed bug is a brown insect less than 1 inch long that feeds off seeds and immature cones of conifer trees. Although the insects were first identified in the western U.S., seed bugs are also found along American and Canadian border regions and in the northeast U.S.


Pest management resources: Gardening in Washington website, PestSightings, PNW Insect Management Handbook, and PNW Plant Disease Management Handbook. B&B 2014 October. Description: Stink bugs: Wanted and unwanted. Western conifer seed bugs. B&B 2015 October. Description: Stink bugs: brown marmorated and native species.


If you’ve noticed a bunch of big, brown bugs creeping and crawling around your home lately, you’re not alone. The brightly colored Western conifer seed bug is laying siege to Western ...


The Western conifer seed bug, commonly known as a 'stink bug.' (Wikimedia Commons photo) Washington residents may be wondering about big brown bugs that have been seen crawling on the walls. They’re “stink bugs” looking to move into a warm, dry place. State Agriculture Department entomologist Arlo Pelegrin told KIRO-FM the Western conifer seed bug is more...


Index of all insects found in the state of Washington. TOP ^ Washington Insects (389 Found) Listing of bugs and other insects that can be found in the state of Washington. Washington Insects (389 Found) ... Western Conifer Seed Bug. Western Flying Adder. Western Grapeleaf Skeletonizer Moth.


Assassin bug Sinea diadema; notice the lack of the leaf-like structure on the hind legs, which the Western conifer seed bug possesses. Photo: Michael Hughes, Bugguide.net. The WCSB can be a pest to the forest industry, particularly in seed orchards, as it can result in a substantial loss of seed crop.