How to identify it
Also called palmetto bug, water bug. Work down these in order — the first one is usually enough on its own.
- A pale yellowish figure-of-eight marking on the shield behind the head
- Fully developed wings; adults can and do fly, especially in heat
- Long antennae, often as long as the body
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
- Sewers, drains, grease traps and storm drains
- Crawlspaces, basements and utility rooms
- Bathrooms at night, having come up a drain line
- Mulch beds and around water meters outdoors
Signs it is already there
You will nearly always see the evidence before you see the pest itself.
- Occasional large roaches at night, often in a bathroom or kitchen
- Droppings with blunt ends and ridged sides, larger than a mouse dropping
- Activity that spikes after heavy rain, when drains flood
Moderate. Worth dealing with, but not an emergency.
Why it is harder to deal with than it looks
Killing the one you see achieves nothing, because it did not come from an indoor population. The question is always how it got in. In older North Texas housing the usual answer is a failed cast-iron drain line or an unsealed plumbing penetration, and no amount of spraying closes that.
What actually works
Find and close the route. Check under-sink plumbing chases, floor drains, the gap around pipes entering walls, and any disused drain. Keep floor drains filled or capped. If several appear indoors regularly, a camera inspection of the drain line is often what actually solves it.
Common questions
How do I tell a american cockroach from a german cockroach?
The German is far smaller with two dark stripes, and indicates an indoor breeding population rather than an entry point.
How do I tell a american cockroach from a oriental cockroach?
The Oriental is smaller, much darker and duller, and the female has only stubby wing pads.
Where are american cockroach usually found in a home?s
Sewers, drains, grease traps and storm drains Crawlspaces, basements and utility rooms Bathrooms at night, having come up a drain line.
Is a american cockroach dangerous?
They travel through sewers before entering living space, so they carry contamination onto surfaces. Structurally harmless.
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.