American Cockroaches

American Cockroaches
  • Size: About 3 to 4 cm long
  • Color: Reddish-brown, with a yellow border on the pronotum
  • Distinctive Feature: Very large size compared to other cockroaches
  • Habitat: Wet and dark areas, sewers, basements
  • Detection Element: Large cylindrical droppings, insects in basements or sewers, distinct musky odor.

Development Stages


Adult American cockroaches are quite distinctive with their relatively large size, measuring up to 4 cm long. Their color varies from reddish-brown to dark brown, and they possess developed wings, although their flying capability is generally limited. Males have more elongated bodies and wings that extend beyond the end of their abdomen, while females have stockier bodies with shorter wings. Recognizing these characteristics is essential for identifying and managing an infestation of American cockroaches.


The nymphs of the American cockroach, visible after hatching, start their life white before quickly darkening. Initially, they measure between 2 and 4 mm long, growing with each molt until almost 40 mm at maturity. They are distinguished by the absence of wings, unlike adults, and their color evolves from light brown to dark brown. This stage is important for identifying an active infestation, as it indicates the presence of a developing colony. Observing their size and color at different stages allows for a better understanding of the extent of the infestation.

Egg (Ootheca)

The eggs of the American cockroach (Periplaneta americana) are grouped in a rigid and protective structure called an ootheca. This capsule can contain between 14 and 16 eggs. It is pale brown to dark brown in color and measures about 8 mm long. Female American cockroaches carry the ootheca attached to the end of their abdomen for a few days before depositing it in a hidden and secure place. Identifying these oothecas is crucial for preventing infestation, as each capsule can give birth to many individuals.

Habitat of American Cockroaches

American cockroaches prefer warm, humid, and dark environments. They are often found in basements, sewers, cellars, and plumbing, from where they can venture into residential or commercial buildings. Inside homes, they are attracted to kitchens, bathrooms, and other areas where they can find food and moisture. They are also known to settle in ventilation ducts, air ducts, and under floors. American cockroaches can move through pipes, which can help them spread in apartment buildings and office complexes.

Behavior of American Cockroaches

American cockroaches are omnivores, feeding on a wide variety of foods, including waste, human food leftovers, paper, leather, and other organic materials. They are primarily nocturnal and hide during the day. When disturbed, they can run very quickly to find refuge. Their reproductive cycle is slower than that of some other cockroach species, but they can still produce a large number of offspring over their lifetime. American cockroaches can live up to two years, a relatively long lifespan for a cockroach. Their presence can often be detected by traces of droppings, which are larger than those of other cockroach species, or by a characteristic odor they emit when in large numbers.

German Cockroaches

German Cockroaches

German cockroaches are significantly smaller than American cockroaches, generally measuring between 13 and 16 mm. They are distinguished by their lighter color, often yellow-brown, and the two black longitudinal bands on their pronotum. Unlike American cockroaches, German cockroaches prefer indoor spaces and are often found in kitchens or bathrooms.

Brown-Banded Cockroaches

Brown-Banded Cockroaches

Brown-Banded cockroaches are smaller than American cockroaches, usually measuring between 10 and 14 mm in length. They are distinguished by their light brown color and the presence of two distinctive brown bands on their thorax and at the base of their wings, hence their name. These cockroaches prefer drier habitats than those of American cockroaches and are often found in places like upholstered furniture, behind picture frames, or in electronic devices. Unlike the American cockroach, they are only capable of flying short distances.

Oriental Cockroach

Oriental Cockroach

Although close to American cockroaches in terms of size, Oriental cockroaches have a darker, almost black color. Females of this species have very short wings, while males have longer wings but do not fly. Oriental cockroaches are more likely to be found in moist and cool environments, like basements or sewers.



Earwigs are recognizable by their pincers (cerci) at the end of their abdomen, a trait absent in cockroaches. They are generally thinner and smaller, measuring up to 25 mm in length. Their color varies from light brown to black. Unlike cockroaches, earwigs are often found outside and are not associated with the same reputation of indoor infestations.

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