Cockroach
Blattodea
Quick answer
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.
Cockroach facts at a glance
| 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) |
| Kingdom | Animalia |
|---|---|
| Phylum | Arthropoda |
| Class | Insecta |
| Order | Blattodea |
Where it lives
Native to tropical forests but now found worldwide, with a few species living alongside people in buildings.
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.
Frequently asked questions about the Cockroach
What do cockroaches eat?
Cockroaches are omnivores that eat almost any organic material, including food crumbs, grease, plants, paper, and decaying matter. This flexible diet helps them survive in many places.
How long can a cockroach live without food?
Cockroaches are very hardy and can survive for several weeks without food, drawing on stored energy. Access to water is generally more important to their survival than food.
Are all cockroaches pests?
No. Only a small number of the thousands of cockroach species are household pests. Most live outdoors in forests and other habitats, where they help break down decaying material.
How long do cockroaches live?
Depending on the species and conditions, cockroaches generally live from several months to about a year. They grow through several molts before reaching adulthood.
Why are cockroaches so hard to get rid of?
Cockroaches are fast, reproduce quickly, hide in tiny cracks, and can survive on very little food. These traits make household infestations difficult to eliminate without thorough effort.
Can cockroaches fly?
Some cockroach species have functional wings and can fly or glide short distances, while others have reduced wings or cannot fly at all. Most rely on running to escape danger.
