How to identify it
Work down these in order — the first one is usually enough on its own.
- Two dark parallel stripes running lengthwise behind the head
- Wings that cover the abdomen, though it rarely flies
- Nymphs are darker, almost black, with the same two stripes
What it gets mistaken for
Most people arrive at a pest name by ruling things out. These are the ones that genuinely look similar, and the detail that separates them.
Where you will find it
- Kitchen — behind and underneath the fridge, dishwasher and stove, inside motor housings
- The gap where a countertop meets the wall, and inside cabinet hinges
- Bathrooms, around plumbing penetrations under sinks
- Anywhere warm, tight and close to food and water
Signs it is already there
You will nearly always see the evidence before you see the pest itself.
- Pepper-like specks in cabinet corners and along shelf undersides
- Small ridged brown egg cases (oothecae), which confirm breeding on site
- Shed skins, since nymphs moult repeatedly as they grow
- A musty, oily smell once the population is significant
High. Costly or fast-moving if it is left alone.
Why it is harder to deal with than it looks
This species does not wander in from outside — it arrives in something you carried in (grocery bags, cardboard, second-hand appliances, moving boxes) and then breeds indoors. Because it harbours in spaces you cannot reach, surface cleaning and spraying barely touch it. Foggers are actively counterproductive: they do not penetrate harbourage and the repellent effect scatters the population deeper into wall voids.
What actually works
Gel bait placed precisely where they harbour and travel, combined with removing food, water and cardboard. Treatment usually needs repeating as eggs hatch. Seeing any roach during daylight suggests the harbourage is crowded, which generally means a well-established population.
Common questions
How do I tell a german cockroach from a american cockroach?
The American is three to four times larger and reddish-brown with a pale figure-of-eight marking rather than two stripes.
How do I tell a german cockroach from a oriental cockroach?
The Oriental is bigger, very dark and glossy, and has no stripes at all.
How do I tell a german cockroach from a brown-banded cockroach?
Brown-banded roaches have pale bands running across the body, not dark stripes along it, and they stay away from water.
Where are german cockroach usually found in a home?s
Kitchen — behind and underneath the fridge, dishwasher and stove, inside motor housings The gap where a countertop meets the wall, and inside cabinet hinges Bathrooms, around plumbing penetrations under sinks.
Is a german cockroach dangerous?
The most consequential roach to find indoors. They reproduce quickly, contaminate food surfaces and are a recognised trigger for asthma and allergies, particularly in children.
Identification guidance only. Under Texas law, applying pest control treatments for hire requires a licence from the Texas Department of Agriculture. This page describes what a pest looks like — it is not a diagnosis of your property or a treatment recommendation for it.