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Upcoming Events

Discussion of 2018 gathering

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


Species Blatta orientalis - Oriental Cockroach

bugss - Blatta orientalis What is it? - Blatta orientalis Ecdysis - Blatta orientalis Oriental Cockroach - Blatta orientalis Help identify this strange bug! - Blatta orientalis - female What Bug is this??? - Blatta orientalis Which side is the head/ - Blatta orientalis Unknown Beetle - Blatta orientalis
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Blattodea (Cockroaches and Termites)
Superfamily Blattoidea
Family Blattidae
Genus Blatta
Species orientalis (Oriental Cockroach)
Other Common Names
Water Bug
Black Beetle
Adults 22- 27mm (about 1 inch)
Flightless. Males have wings covering 3/4 of their body length; females have only rudimentary wing stubs.
Relatively cool, damp areas - basements, crawl spaces. Not usually found on higher floors of buildings.
Omnivorous but prefers starchy or sugary foods. Often associated with garbage or decaying organic matter, indoors or out. Can survive one month without food as long as water is available, or two weeks with neither food nor water.
Life Cycle
Females lay rectangular brown egg cases referred to as ootheca. See Pictures from University of Nebraska for comparison of four common species' egg cases. They may lay one every month, up to eighteen in a lifetime. On average, 14 nymphs per egg case hatch about two months later. Nymphs grow and cast their skin 7 -10 times before reaching adulthood over the course of about 12 months. Adults generally live 1 - 6 months.