German cockroach vs Oriental cockroach
These two are easy to mix up. Here's how to tell a German cockroach from an Oriental cockroach, and whether either one bites or stings.
German cockroach
Blattella germanica
Oriental cockroach
Blatta orientalis
≠The key differences
Much darker (near black), larger and slower-moving; prefers cooler, damp locations like basements.
Smaller (12-16 mm), light brown with two dark parallel stripes on the pronotum; fast-moving and commonly found in kitchens and food preparation areas.
⚖︎Side by side
| German cockroach | Oriental cockroach | |
|---|---|---|
| To humans | Allergen carrier | Contaminant |
| Size | 12-16 mm body length | Males about 18-25 mm; females about 25-32 mm (body length) |
| Colours | Light brown, Dark brown, Pale cream (underside) | Dark brown, Black, Reddish brown (young nymphs) |
| Family | Ectobiidae | Blattidae |
| Habitat | Human dwellings: kitchens, bathrooms, behind appliances, inside cabinets, wall and floor voids, near plumbing and heat sources | Cool, damp and shaded areas around human buildings: basements, crawlspaces, drains, sewers, leaf litter and compost piles. |
| Range | Worldwide in temperate and tropical regions as a human commensal | Originally from the Middle East or Mediterranean region; now widespread worldwide in temperate to subtropical regions and commonly established in cities globally. |
| Active | Primarily nocturnal; most active at night year-round in heated buildings | Mostly nocturnal; active year-round in warm buildings, outdoors in temperate climates mainly spring to autumn. |
| Pest? | Yes | Yes |
🔍How to spot a German cockroach
- Small size (12-16 mm) and light brown colour with two dark parallel stripes on the pronotum
- Nocturnal behaviour; typically seen running, not flying, and hiding in cracks and behind appliances
- Both sexes have wings but poor flight; males are slightly more slender
- Nymphs are wingless and darker when newly hatched, becoming browner with molts
🔍How to spot an Oriental cockroach
- Uniform dark brown to black, glossy, oval body about 18-32 mm long.
- Relatively slow-moving and poor climber; often found at ground level or in drains.
- Males smaller with short wings covering most of abdomen; females larger and broader with only tiny wing pads and no flight.
- Found in cool, damp locations such as basements, crawlspaces, leaf litter, compost and sewers.
?Frequently asked questions
What is the difference between a German cockroach and an Oriental cockroach?
Much darker (near black), larger and slower-moving; prefers cooler, damp locations like basements. Smaller (12-16 mm), light brown with two dark parallel stripes on the pronotum; fast-moving and commonly found in kitchens and food preparation areas.
Is a German cockroach or an Oriental cockroach more dangerous?
German cockroach: Allergen carrier. Oriental cockroach: Contaminant. German cockroaches do not bite or sting and are not venomous, but they contaminate food and surfaces with bacteria and allergens from droppings and shed skins. Oriental cockroaches do not bite or sting and are not venomous.
Identification from photos is never certain: don't handle insects you can't identify, and get medical advice for bites, stings or allergic reactions.