Roach Identification Chart

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Egg Case

Nymphs

Adults

Description

German Cockroach (Blattella germanica)

  • Adults average 1/2 to 5/8 inches in length
  • Nymphs average 1/16 to 1/2 inch long
  • Tan to light brown; two longitudinal stripes on the pronotum
  • Females are larger than males and may have an egg case protruding from the end of their abdomen
  • Egg cases contain 30 to 40 young; each egg develops into an adult within 50 days

American Cockroach (Periplaneta americana)

  • Adults average: 1 1/4 to 2 1/8 inches in length
  • One of largest species to infest structures (also known as water bugs or Palmetto bugs)
  • Found in northern and southern climates; thrive outdoors in the South
  • Males’ wings extend beyond the abdomen; females’ wings do not
  • Prefer dark, moist areas near food sources and may enter structures through sewer pipes and floor drains
  • Seek harbor in voids, including masonry block voids, and may travel in areas above drop ceilings
  • Males can fly and are attracted to artificial light

Australian Cockroach (Periplaneta australasiae)

  • Adults can grow up to 1 1/4 inches long
  • Closely resembles American cockroach in size and color
  • Has pale yellow stripes at the base of wing pads and the margin of the protonum
  • Not commonly found indoors but will be found there when temperatures are high
  • Can be brought into accounts on indoor plants and may be found everywhere American cockroaches are active (except sewers)
  • Also infest greenhouses, zoos and commercial accounts where conditions are suitable

Oriental Cockroach (Blatta orientalis)

  • Adults to grow up to 1 inch in length
  • Distinctively shiny and black
  • Males’ wings take up 2/3 the length of the abdomen; female wings take up 1/4 the length of the abdomen
  • Does not fly and has difficulty climbing smooth surfaces
  • Susceptible to dehydration; seeks moist areas in which to hide
  • Usually found in basements, crawl spaces and the lower floors of an account
  • In southern climates, may be found outdoors hiding in leaf litter, beneath logs, and mulch

Smokybrown Cockroach (Periplaneta fuliginosa)

  • Adults range from 1 1/4 to 1 1/2 inches in length
  • Easily recognized by its uniform mahogany brown color
  • Found outdoors in the South
  • Hides in mulch, leaf litter, ground cover, woodpiles and tree bark for protection against dessication
  • Often found dead indoors likely due to dehydration
  • Typically enters a structure through the attic and open spaces
  • Both males and females can fly

Brownbanded Cockroach (Supella longipalpa)

  • Adults average 5/8 of an inch in length
  • Similar in size and appearance to the German Cockroach
  • Rather than longitudinal stripes found on the pronotum, they have two broad brown bands on their wings
  • Infest structures across the United States
  • Prefer warmer areas but may be found in any area within a structure
  • Not generally found in kitchen and bath areas, as can be expected with German Cockroaches
  • May be found in furniture, wall hangings, picture frames, light fixtures, and drop ceilings

 

Monica Bird (933 Posts)

Monica’s compassion for her customer's struggles with pest control issues and passion for pest control stems from over 10 years in the industry. With a master’s degree in entomology, she uses her knowledge and experience in chemistry, insects and pests to educate her customers.


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