North Texas · Owner-operated

Cockroach Identification & Prevention

Compare markings and locations to help distinguish indoor-breeding roaches from occasional outdoor visitors.

Possible matches are a starting point. A photo alone may not confirm identification.

Indoor vs. outdoor

Not every roach tells the same story.

Size, markings, and where you see activity help separate indoor-breeding roaches from species that often enter from outside.

4 possible matches · these clues do not confirm identification.

A sighting is a starting point.

One outdoor roach indoors does not automatically mean an indoor infestation. Repeated sightings, young roaches, or activity near appliances deserve a closer inspection.

Adult German cockroach showing two dark lengthwise stripes behind its head
German cockroach · adult
Photo credit & license

Clemson University – USDA Cooperative Extension Slide Series / © Bugwood.org · CC BY 3.0 US. Resized and converted to WebP; source image was cropped by its contributor.

Often breeds indoors

German cockroach

Small and tan, with two dark stripes behind the head.

Compare clues & prevention steps

Clues to compare

  • Adults are about ½–⅝ inch long.
  • Two lengthwise stripes appear on the shield just behind the head.
  • Young roaches can look different from adults.

Why it may be showing up

They can arrive in boxes or belongings, or spread from nearby infested spaces. Warm indoor hiding places near food and moisture support them.

What you can do

  • Clean crumbs and grease; fix leaks.
  • Reduce cardboard and inspect incoming items.
  • Seek a focused inspection for repeated indoor sightings.
Look-alikes matter. Other small roaches can be similar. Do not identify by size alone.

Learn more: Texas A&M · German cockroaches

American cockroach reference photograph showing reddish-brown body and pale head-shield border
American cockroach · reference photo
Photo credit & license

NY State IPM Program at Cornell University · CC BY 2.0. Resized and converted to WebP; displayed without cropping.

Large reddish-brown roach

American cockroach

A pale border around the shield behind the head.

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Clues to compare

  • Adults are commonly around 1½–2 inches long.
  • Reddish-brown with a light border on the head shield.

Why it may be showing up

Moist, sheltered sites can support activity, with entry through gaps or around plumbing.

What you can do

  • Fix leaks and reduce damp debris.
  • Check door sweeps and pipe openings.
Look-alikes matter. Other large roaches, including smokybrown, may look similar.

Learn more: Texas A&M · Outdoor cockroaches

Adult smokybrown cockroach with uniformly dark brown body and wings covering the abdomen
Smokybrown cockroach · adult
Photo credit & license

Len Worthington · CC BY-SA 2.0. Resized and converted to WebP; displayed without cropping.

Often associated with outdoors

Smokybrown cockroach

Even mahogany-brown color; wings cover the abdomen.

Compare clues & prevention steps

Clues to compare

  • Adults are roughly 1–1½ inches long.
  • The adult is uniformly dark brown rather than pale-bordered.

Why it may be showing up

Humid shelter around mulch, trees, or roof spaces can support them.

What you can do

  • Reduce wet leaf litter near the home.
  • Review screens, eaves, and entry gaps.
Look-alikes matter. Young stages have different markings. Compare adults carefully.

Learn more: Texas A&M · Outdoor cockroaches

Adult female Oriental cockroach with a shiny dark body and reduced wing pads
Oriental cockroach · female
Photo credit & license

H. Zell · CC BY-SA 3.0. Resized and converted to WebP; displayed without cropping.

Damp, ground-level sites

Oriental cockroach

Shiny dark brown or black, with reduced wings.

Compare clues & prevention steps

Clues to compare

  • Adults are around 1–1¼ inches long.
  • Females have very short wing pads; male wings are also shortened.

Why it may be showing up

Cool, damp shelter near the ground can favor activity.

What you can do

  • Correct moisture and drainage problems.
  • Clear damp debris from entry points.
Look-alikes matter. Turkestan females can look similar and need closer inspection.

Learn more: Texas A&M · Outdoor cockroaches

Your local next step

You don’t have to figure it out alone.

Talk directly with PJ. Choose Pest, Lawn, or Termite help and prepare a message with your service address. You can review it and attach photos in your own email or text app before sending.

This prepares a message on your device. Nothing is sent automatically.

General education for North Texas homeowners. Identification and treatment needs vary. Follow product labels and PJ’s instructions for the specific service. Reference photos show examples, not photos from your property.