For that reason they are sometimes incorrectly called stink bugs. Seed production operations can suffer as well, as a loss of seed can result. ... 2016 - Western Conifer Seed Bug - … Residents of Massachusetts may see this large, brown home invader come fall. Hizal E, … While the western conifer seed bug can sneak into buildings in the fall, they tend to invade in relatively low numbers. The western conifer seed bug (Leptoglossus occidentalis), also called the pine seed bug, is a commonly found insect which is often seen invading homes in large numbers during certain periods of spring, fall, and winter. Western Conifer Seed Bug—Leptoglossus occidentalis . 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. Western conifer seed bugs can fly readily and may make a buzzing noise if disturbed. References ↑ Klass, C. 2007. There are several native seed bugs in the Pacific Northwest (PNW). Examples include the boxelder bug (Heteroptera: Rhopolidae; Boisia trivittata), the western conifer seed bug (Heteroptera: Coreidae; Leptoglosus occidentalis), some stinkbugs (Heteroptera: Pentatomidae) and many others. As an additional nuisance, though they are not true stink bugs, Western conifer seed bugs will release a “stinky” liquid when startled. The Western Conifer Seed Bug also seeks the warmth of your home to bunker down in for the winter. It also gets blamed for being several different insects because of its body shape and coloration. The western conifer seed bug has become a nuisance pest in many homes. The Western Conifer Seed Bug is often mistaken by people for either the Asian Longhorned Beetle, or for an Assassin Bug.. The western conifer-seed bug is a plant eater, harmless to humans, while kissing bugs are vectors of the pathogen that causes Chagas disease. Fighting the Invasive Stinkbug | National Geographic - Duration: 5:01. The Western Conifer Seed Bug is a type of leaf-footed bug that feeds on seeds of trees, especially pine. National Geographic Recommended for you. The adult is about 3/4 inch (16-20 mm) in length and is dull brownish. Western conifer seed bugs are also often mistakenly identified as assassin bugs. Western conifer seed bugs are also often mistakenly identified as assassin bugs. It is a type of leaf-footed bug that feeds on seeds of trees, especially pine. There is a faint white zigzag stripe across the midpoint of its upper surface. From invasive species to freaky-looking spiders to brightly-colored beetles, here are the most common house bugs to know and how to identify them. The happy news in all of this is that the suspected brown marmorated stink bug is probably a western conifer seed bug. The WCSB is not regarded as a forest pest, but is of concern to nursery operations as the insects damage the endosperm of the maturing seeds.