10 Surprising Cockroach Facts You Never Knew (2025 Guide) 2026

Cockroaches are among the most invasive and hated insects of summer. Many legends surround these creatures—some completely fabricated, but others surprisingly true. Let's uncover 10 things about cockroaches you probably didn't know, backed by science and pest control expertise.

1. The Most Common Cockroach Species in Italy (and the US)

In Italy, the most widespread species are the oriental cockroach (Blatta orientalis), the American cockroach (Periplaneta americana), and the German cockroach (Blattella germanica). These same species are also common in US households, each with unique behaviors and habitat preferences.

2. Lightning-Fast Speed: A Defense Mechanism

Cockroaches are incredibly fast—they can cover 1.5 meters per second. To put that in human terms, it's the equivalent of running about 320 km/h (200 mph)! This speed is a defense mechanism against predators like birds, lizards, and even humans.

3. They Are Necrophagous (and Eat Almost Anything)

Cockroaches are necrophagous, meaning they feed on the dead bodies of their own kind. But their diet goes far beyond that: they consume glue, fruit, feces, soap, paper, and any organic matter within reach. This adaptability makes them extremely difficult to control without professional help.

4. Survival Underwater and Breath-Holding Abilities

Unlike humans, cockroaches don't breathe through their mouths. They use spiracles (small holes along their body) to take in oxygen. This allows them to survive underwater for up to 30 minutes and hold their breath for 40 minutes. This trait helps them survive flooding and other harsh conditions.

5. Can a Cockroach Live Without Its Head? Yes, for a Week!

Because they breathe through spiracles and have a decentralized nervous system, a cockroach can survive without its head for up to a week. Combined with their ability to go without food for 30 days, they can endure extremely precarious situations. However, they eventually die from dehydration, not starvation.

6. Ancient Survivors: 300 Million Years on Earth

Cockroaches have been on Earth for an estimated 300 million years. They coexisted with dinosaurs and have survived multiple mass extinction events. Their resilience is unmatched in the insect world.

7. Nuclear Radiation: Myth vs. Reality

After the Hiroshima and Nagasaki bombings in 1945, cockroaches were among the few creatures found alive, sparking the myth that they can survive nuclear explosions. The TV show MythBusters later debunked this: no cockroach survived radiation levels of 100,000 rad. However, they do have a much higher radiation tolerance than humans—about 6 to 15 times more resistant.

8. They Don't Fly—They Glide

Many cockroach species have wings, but they rarely use them for true flight. Instead, they glide from high points to lower ones, covering short distances. This is often triggered by a need to escape danger or find food.

9. Devoted Mothers: Cockroach Pouch Carriers

Most female cockroaches carry their offspring in small egg cases (oothecae), which they transport with them much like kangaroos carry joeys. Some species even give live birth. This maternal behavior ensures higher survival rates for their young.

10. A Delicacy in Many Cultures

According to the MeatAtlas2021 report, in 130 countries, about 2 billion people regularly eat cockroaches, worms, and crickets. They are a sustainable protein source, rich in nutrients, and are farmed in many parts of the world.

How to Keep Cockroaches Out of Your Home

If cockroaches aren't your idea of a tasty snack and you want them gone from your home or workplace, professional pest control is your best bet. For severe infestations, some property owners turn to targeted solutions like the best poison for raccoons—but for cockroaches, integrated pest management (IPM) is more effective. This includes sealing entry points, eliminating food sources, and using gel baits or insect growth regulators.

Why Cockroach Infestations Are Dangerous

Cockroaches are not just a nuisance—they pose serious health risks:

• They carry pathogens like Salmonella and E. coli on their legs and bodies.
• Their droppings and shed skin can trigger allergies and asthma, especially in children.
• They contaminate food and surfaces, leading to food poisoning.

Prevention Tips for Homeowners

Here are actionable steps to reduce the risk of cockroach infestations:

• Keep your kitchen clean—no crumbs, dirty dishes, or open food containers.
• Seal cracks and crevices around pipes, windows, and doors.
• Reduce moisture by fixing leaks and using dehumidifiers.
• Store food in airtight containers and take out trash regularly.
• Inspect second-hand furniture and packages before bringing them inside.

For more on handling tough pests in your yard, check out our guide on banger racing and pest control or learn about unexpected pest encounters in outdoor spaces.

FAQ

1. Can cockroaches really survive a nuclear bomb?

No, this is a myth. While cockroaches are more resistant to radiation than humans, they cannot survive the direct blast or extreme radiation levels of a nuclear explosion. They died at 100,000 rad in controlled experiments.

2. How long can a cockroach live without food or water?

Cockroaches can survive up to 30 days without food but only about 1 week without water. This is why moisture control is critical in pest prevention.

3. What attracts cockroaches to my home?

Cockroaches are attracted to food, moisture, and warmth. Common attractants include crumbs, pet food, leaky pipes, and clutter that provides hiding spots.

4. Are cockroaches dangerous to my health?

Yes. They carry bacteria, viruses, and allergens that can cause food poisoning, asthma attacks, and allergic reactions. Their presence is a sign of unsanitary conditions.

5. What's the best way to get rid of a cockroach infestation?

For small infestations, use gel baits and sticky traps. For large infestations, professional pest control is recommended. Integrated Pest Management (IPM) combining sanitation, exclusion, and targeted treatments is most effective.