Wildlife Guide · Africa & Asia
Cockroach
Blattodea
The hardy survivor that lives almost anywhere
Image: Photo: Wikimedia Commons / Wikimedia Commons (Public domain)
In brief
Cockroaches are flattened, fast-moving insects known for their toughness and ability to thrive in many environments. Most of the thousands of species live in the wild, but a few have become common household pests.
By the WARN Research & Conservation TeamChecked against IUCN Red List & CITES sourcesLast updated
Cockroaches are flattened, fast-moving insects known for their toughness and ability to thrive in many environments. Most of the thousands of species live in the wild, but a few have become common household pests. They are omnivores that eat almost anything and can survive for weeks without food.
0.03 m
Typical length
1 g
Typical weight
5 km/h
Top speed
1 yrs
Lifespan
Figures sourced from Wikipedia — Cockroach, Wikidata — Cockroach .
Cockroach: Quick Facts
| Scientific name | Order Blattodea |
|---|---|
| Diet | Omnivore (almost anything organic) |
| Habitat | Forests, burrows, and human buildings worldwide |
| Lifespan | Several months to about a year |
| Size | About 1–8 cm depending on species |
| Top speed | ~5 km/h (3 mph), very fast for its size |
| Conservation status | Least Concern (IUCN) |
Scientific Classification
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Class | Insecta |
| Order | Blattodea |
Conservation Status
- IUCN Status
- Least Concern (IUCN Red List category)
- Population
- Global population not compiled for this guide
- Trend
- See the IUCN Red List assessment
- Assessed
- See the IUCN Red List assessment
- CITES
- See CITES appendices
Conservation figures are drawn from the IUCN Red List and CITES; this guide links to the authoritative sources rather than restating population counts.
Key Facts: Cockroach
- Cockroaches have flat, flexible bodies that let them squeeze into tiny cracks, and they can move very quickly to escape danger.
- As omnivores, cockroaches eat almost anything organic, including plants, crumbs, grease, paper, and decaying matter.
- Only a small number of cockroach species are household pests, but those that are can contaminate food and trigger allergies in some people.
Built for survival
Cockroaches have flat, flexible bodies that let them squeeze into tiny cracks, and they can move very quickly to escape danger. They are highly adaptable, tolerating a wide range of conditions and going for weeks without food. These traits have made them successful for hundreds of millions of years.
Diet and behavior
As omnivores, cockroaches eat almost anything organic, including plants, crumbs, grease, paper, and decaying matter. Most species are active at night and prefer dark, warm, humid hiding places. They are social to a degree and often gather in groups, guided by chemical scent trails.
Pests and ecology
Only a small number of cockroach species are household pests, but those that are can contaminate food and trigger allergies in some people. The great majority of cockroach species live outdoors in forests and other habitats, where they help recycle decaying plant material and serve as food for other animals.
Life cycle
Cockroaches develop through incomplete metamorphosis, hatching from egg cases as small nymphs that look like wingless adults. They molt several times as they grow. Many females carry or hide a protective egg case called an ootheca, which holds multiple eggs.
What WARN Does
WARN does not run a dedicated cockroach programme — this guide is part of the World Animal Rescue Network's free educational library. The cockroach is currently widespread and not globally threatened, and this guide helps readers understand the pressures that can change that. Building public understanding of species like the cockroach supports the broader conservation awareness that underpins WARN's partner-led rescue work across its network.
If clear, science-based wildlife guides like this help you understand and value animals, please consider supporting the World Animal Rescue Network's educational and rescue work so we can keep producing them.
Cockroach: Frequently Asked Questions
What do cockroaches eat?
How long can a cockroach live without food?
Are all cockroaches pests?
How long do cockroaches live?
Why are cockroaches so hard to get rid of?
Can cockroaches fly?
Where do cockroaches live?
Are cockroaches dangerous?
How big is a cockroach?
Sources & References
Population figures, conservation status and biological facts on this page are drawn from authoritative scientific and intergovernmental sources.
Terms used on this page
Plain-English definitions, from our wildlife and conservation glossary.
Latest Cockroach Stories
Quick, fact-checked reads on the cockroach — amazing facts, key questions and the threats it faces.
Species
Slow Loris: Why the Internet's Favourite Pet Is a Conservation Disaster
The slow loris looks like a cartoon character — and that has nearly destroyed the species. Here is the truth behind the viral videos.
Read the storySpecies
The Snow Leopard: Why the Ghost of the Mountains Is Still Vulnerable
The snow leopard is one of the most elusive big cats on earth, with an estimated 4,000-6,500 individuals across twelve range states — including Pakistan, where WARN is preparing to operate. This briefing explains why the species was downlisted from Endangered to Vulnerable in 2017 and why that is not the success story it sounds like.
Read the storyGuides
Sun Bear vs Moon Bear: The Two Most Trafficked Asian Bears
The sun bear and the Asiatic black bear (moon bear) are the two most commonly trafficked bears in Asia — for the pet trade, for traditional medicine and for bear-bile farming. Here is how to tell them apart.
Read the storyExplore More Species
Every animal in our network faces a crisis. Learn about the others.
View all wildlife guides