American Vs German Cockroach

What Are The Differences? American Vs German Cockroach

American Vs German Cockroach

The American cockroach (Periplaneta americana) and the German cockroach (Blattella germanica) are two common species of cockroaches that often cause problems in residential and commercial settings. 

While they share some similarities, there are significant differences between the two. The American cockroach is larger, measuring about 1.5 to 2 inches in length, while the German cockroach is smaller, ranging from 0.5 to 0.6 inches.

Comparing American Vs German Cockroach

German Cockroach (Blattella germanica)American Cockroach (Periplaneta americana)
SizeSmaller, about 0.5 to 0.6German Vs American Cockroach: Size
Larger, about 1.5 to 2 inches
HabitatWarm and humid environmentsDamp and dark areas, sewers
Flying AbilityPoor flyersGood flyers
Preferred EnvironmentsKitchens, bathrooms, indoor areasBasements, sewers, outdoor areas
Reproduction RateRapid reproduction, high breeding rateSlower reproduction, lower breeding rate
Susceptibility to ColdMore sensitive to cold temperaturesTolerant of colder temperatures
Health ConcernsCan carry diseases and trigger allergiesCan carry diseases and trigger allergies
Control and PreventionRequires thorough sanitation, targeted treatment methodsSanitation, habitat modification, and targeted treatments
Global DistributionFound worldwide, common in urban areasFound worldwide, more common in rural areas

American Vs German Cockroach: Size

German Cockroach (Blattella germanica):

  • Smaller Size: The German cockroach is relatively small, measuring about 0.5 to 0.6 inches in length.

American Cockroach (Periplaneta americana):

  • Larger Size: The American cockroach is significantly larger than the German cockroach, measuring about 1.5 to 2 inches in length.

American Vs German Cockroach:Eat

German Cockroach (Blattella germanica):

  • Omnivorous Diet: German cockroaches are omnivores and will feed on a wide range of food sources. They are particularly attracted to starchy and sugary foods, including crumbs, grease, sweets, and pet food.

American Cockroach (Periplaneta americana):

  • Omnivorous Diet: American cockroaches are also omnivorous and will consume a variety of organic materials. They feed on food crumbs, decaying matter, plant material, and even smaller insects if available.

American Vs German Cockroach:Habits 

American Cockroach Habits 

Outdoor and Indoor Presence:

  • American cockroaches are more commonly found outdoors, particularly in areas with high moisture such as sewers, basements, and damp environments.

Outdoor Habitat:

  • They can also be found in outdoor areas like gardens and landscaping, where they feed on decaying organic matter.

Nocturnal Activity:

  • American cockroaches are primarily nocturnal, with increased activity during warm summer nights.

Good Flyers:

  • Unlike German cockroaches, American cockroaches have well-developed wings and are capable of sustained flight.

Large Size:

  • They are relatively larger than German cockroaches, measuring about 1.5 to 2 inches in length.

German Cockroach Habits 

Indoor Preference:

  • German cockroaches are primarily indoor pests and are commonly found in residential and commercial buildings.

Preferred Environments:

  • They thrive in warm and humid environments such as kitchens, bathrooms, and areas with access to food, water, and shelter.

Nocturnal Activity:

  • German cockroaches are primarily active at night and tend to hide in cracks, crevices, and small spaces during the day.

High Reproduction Rate:

  • They have a rapid breeding cycle, with females producing multiple egg cases (oothecae) during their lifetime, resulting in large infestations if left unchecked.

Aggregating Behavior:

  • German cockroaches have a tendency to aggregate, meaning they prefer to live and breed in close proximity to each other.

Get Rid Of American Vs German Cockroach

American Cockroach 

Sanitation and Cleaning:

  • Remove Food Sources: Clean up spills, crumbs, and food debris promptly. Store food in sealed containers.
  • Eliminate Standing Water: Fix leaks and address any areas with excess moisture to remove water sources.
  • Reduce Clutter: Declutter in your living spaces to the eliminate potential of hiding spots for cockroaches.


  • Seal Entry Points: Inspect and seal cracks, gaps, and openings in walls, windows, doors, and foundation to prevent cockroaches from entering your home.
  • Install Door Sweeps: Use door sweeps to seal gaps at the bottom of doors to prevent cockroach entry.

Removal of Hiding Places:

  • Declutter: Remove unnecessary items, such as piles of cardboard boxes or newspapers, as they can provide hiding spots for cockroaches.
  • Remove Cardboard: Cockroaches are attracted to cardboard, so replace it with plastic storage containers whenever possible.

German Cockroach

Identify the Problem:

  • Recognize the signs of German cockroach infestation, such as sighting live cockroaches, droppings, egg cases (oothecae), or a musty odor.American vs german cockroach


  • Remove food and water sources by cleaning up spills, crumbs, and food debris.
  • Store food in airtight containers and keep trash cans tightly sealed.
  • Regularly clean kitchen appliances, cabinets, and countertops.

Eliminate Hiding Places:

  • Seal cracks, crevices, and gaps in walls, floors, and cabinets using caulk or sealant.
  • Repair any leaky pipes, faucets, or appliances to eliminate water sources.
  • Remove clutter and unnecessary items that provide hiding spots for cockroaches.

Also Check: Asian cockroach


German cockroaches (Blattella germanica) are smaller in size, measuring about 0.5 to 0.6 inches, while American cockroaches (Periplaneta americana) are larger, measuring about 1.5 to 2 inches. They also have different habitat preferences, with German cockroaches primarily infesting indoor areas, while American cockroaches are more commonly found outdoors but can enter buildings.

Both German and American cockroaches can carry and transmit diseases, contaminate food, and trigger allergies. However, they are not considered as dangerous as certain other species of cockroaches. Nevertheless, their presence in homes or commercial spaces can be a nuisance and may indicate unsanitary conditions.

German cockroaches are small, light brown to tan in color, and have two dark parallel stripes on their pronotum (the plate-like structure covering their thorax). American cockroaches are reddish-brown with a distinctive yellowish figure-eight pattern on their pronotum.

Signs of infestation may include sightings of live cockroaches, especially during nighttime, finding their droppings resembling coffee grounds or pepper flakes, discovering egg cases (oothecae), or noticing a musty odor in the affected area.

Effective control involves a combination of sanitation practices, exclusion measures, and targeted treatments. These may include thorough cleaning, sealing entry points, using cockroach baits or gels, employing insecticide sprays, or seeking assistance from professional pest control services.


German cockroaches (Blattella germanica) and american vs german cockroach (Periplaneta americana) are two common species of cockroaches that differ in various aspects.German cockroaches are smaller in size, primarily infest indoor areas, have a high reproduction rate, and are attracted to warm and humid environments. They are known for their rapid breeding cycle and aggregating behavior, making infestations challenging to control. Sanitation, targeted treatments, and eliminating hiding places are crucial for managing German cockroach infestations.american vs german cockroach

Similar Posts

Leave a Reply

Your email address will not be published. Required fields are marked *