American cockroach

This bug is very large.

It is reddish brown. It has a yellow part near its head.

It is a very fast runner. It can dart away from danger. It can even fly short distances.

These bugs love warm and wet spots. They like to live in basements. They can hide in tiny cracks.

They come from Africa. They have long feelers on their heads. They like to eat many things.

They are very busy at night. They do not like bright light.

It is a very interesting insect.

The American cockroach is a large insect.

Many people call it a pest. Even with this name, it is not from America. These bugs are native to Africa and the Middle East. They moved to the Americas a long time ago.

This insect has a reddish-brown body. It has a shield-like part behind its head. We call this part a pronotum.

It also has long antennae. These help the bug feel its way. The cockroach has very large eyes. Each eye has over 3,500 tiny lenses. These lenses help the bug see at night.

American cockroaches are very fast runners. They can run at speeds that match a human running very fast.

They can also fly short distances. They prefer to stay in warm and moist places. They often live in basements or sewers. They like high temperatures. If it gets too cold, they may die.

Females lay eggs in a brown case. This case is called an ootheca.

The American cockroach is a very large insect.

Many people call it a pest because it lives in homes. Some people even call it a waterbug or a Bombay canary. Despite its name, this insect is not actually from the Americas. It is native to Africa and the Middle East. These insects arrived in the Americas starting in the 17th century. They traveled through human trade patterns, including the Atlantic slave trade.

This insect has a very interesting way it works. A female produces a brown, purse-shaped egg case called an ootheca.

She carries this case at the tip of her abdomen. After about two days, she places the case in a safe spot. Inside, the young insects emerge after six to eight weeks. These young ones are called nymphs. They look like adults but do not have wings yet. The nymphs must go through about 13 moultings to grow up.

Scientists have studied these insects for a long time. They have found many things about how they live. For example, they know the insect has a very large genome. In fact, it is the second-largest insect genome ever recorded. This genome helps them adapt to living near humans. It contains 522 different taste receptors. This is the largest number of taste receptors found in any sequenced insect. Most of these help them sense bitter tastes.

There are many specific facts about their bodies. The American cockroach is reddish brown with a yellowish edge on its pronotum. The pronotum is a shield-like plate behind the head.

These insects are among the fastest runners in the world. One insect ran at 50 body lengths per second. This is like a human running at 210 miles per hour. They also have large eyes with over 3,500 lenses. These lenses help them see well at night.

You might see these insects in your own neighborhood. They like warm and moist places like basements or sewers. They can also be found in cracks near porches. They are omnivores, which means they eat many different things. They eat cheese, sweets, and even glue or paper.

In some parts of the world, people use them in medicine. In China, an extract of the cockroach is used for healing wounds. This shows how humans and these insects are closely linked.

The American cockroach, known scientifically as *Periplaneta americana*, is a large insect often found in human environments.

While many people consider them pests, they are fascinating biological subjects. They are sometimes called waterbugs, though they are not aquatic insects. They are also known by names like the ship cockroach or the Bombay canary. Despite their common name, these cockroaches are not native to the Americas. They originally came from Africa and the Middle East. They were introduced to the Americas starting in the 17th century through human commercial patterns, including the Atlantic slave trade. Today, they are found almost everywhere in the world due to global commerce.

The biology of the American cockroach is defined by its impressive size and life cycle. It is the largest of the common cockroach species. Its life cycle can last up to about 700 days. Before reaching adulthood, the insect undergoes metamorphosis through 6 to 14 molts, with 13 being the most common number.

The body is divided into three main sections: the head, the thorax, and the abdomen. The thorax, or trunk, is further divided into the prothorax, mesothorax, and metathorax. Each of these segments produces a pair of cursorial legs, which are legs specialized for running. The abdomen consists of 10 segments. These segments are protected by chitinous plates called sclerites, which include dorsal tergites, ventral sternites, and lateral pleurites.

The reproductive process of the American cockroach is quite complex. A female produces an egg case called an ootheca. This case is brown, purse-shaped, and about 8 mm long. The female carries the ootheca at the tip of her abdomen for about two days before placing it in a safe location. Inside the case, the eggs hatch into nymphs after 6 to 8 weeks. These nymphs are wingless versions of the adults. They must undergo 13 molts, or ecdysis, to reach maturity. This maturation process can take 6 to 12 months. Adult females can live for an additional year and produce an average of 150 young. The entire reproductive cycle can last up to 600 days.

Physical adaptations allow the American cockroach to survive in many environments. They possess large compound eyes. Each eye contains over 3,500 individual lenses called ommatidia. These hexagonal apertures provide mosaic vision. This type of vision offers high sensitivity, which is very useful for nocturnal vision at night. They are also incredibly fast runners. In one experiment, a cockroach reached a speed of 53 body lengths per second. This speed is comparable to a human running at 210 miles per hour. Their flattened, oval bodies allow them to squeeze into small cracks and under doors.

The genetic makeup of the American cockroach is also remarkable. It possesses the second-largest insect genome ever recorded. About 60% of its genome is made of repeat elements. The genome is highly specialized for sensing the environment. It contains 522 taste receptors, which is the largest number found in any sequenced insect. Specifically, 329 of these receptors are used for bitter taste perception. They also have 154 olfactory receptors for smelling. These genetic tools, along with enhanced immune and detoxification genes, help them adapt to living in human spaces.

American cockroaches are opportunistic omnivores, meaning they eat a wide variety of materials. They enjoy fermenting foods, cheese, sweets, and bakery products. They can even eat non-food items like leather, glue, hair, and the starch in book bindings. They prefer warm, moist environments and thrive in temperatures around 30°C. They do not tolerate cold well. If temperatures drop to 10°C or below, many cockroaches will die within 72 hours. Because they can carry bacteria like *Salmonella* on their legs, they can pose a risk to food safety. They can also trigger allergies or asthma in some people through their feces and body parts.

Interestingly, these insects have been used in human systems for centuries. In traditional Chinese medicine, an ethanol extract of the American cockroach is used. This extract, called *Kāngfùxīn Yè*, is prescribed for tissue repair and wound healing. This connection shows how humans have interacted with this species for a long time. While they are often managed with glue board traps or insecticides, their ability to adapt remains a major part of their biology. Their presence in human history is a direct result of how humans have moved goods and people across the globe.