Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

National Moth Week photos of insects and people. Here's how to add your images.

Photos of insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

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


Species Blatta orientalis - Oriental Cockroach

Oriental Cockroach - Blatta orientalis - male Outdoor Oriental cockroach - Blatta orientalis - male What Bug is this??? - Blatta orientalis Cockroach - Blatta orientalis Blatta orientalis? - Blatta orientalis Turkestan Cockroach - Blatta orientalis Unknown Beetle - Blatta orientalis Cricket grasshopper bee - 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.