Cockroaches are one of the most common pests in Brisbane homes and businesses. They favour conditions similar to those that humans create, which is why effective cockroach control and cockroach management in Brisbane is so important. Cockroaches can contaminate food, utensils and preparation areas with droppings, cast skins, egg sacs, regurgitation marks and foul odours.

The Most Common Cockroach Species Encountered in Brisbane

  • American (Periplaneta Americana spp.)
  • Australian (Periplaneta Australasiae spp.)
  • German (Blattella Germanicaspp.)
  • Oriental (Blatta Orientalis spp.)
  • Smoky Brown (Periplaneta Fuliginosa spp.)
  • Brown Banded (Supella Longipalpa spp.)

German cockroaches can be a major problem in commercial kitchens, restaurants, pubs, cafes and in our homes as they are prolific breeders, and can live in refrigerators and in ovens as well as the smallest cracks and crevices. They are a relatively small cockroach, ranging from nymphs (young insects) the size of a pinhead to adults up to 15–25 mm long.

Australian, American and to a lesser degree the smoky brown cockroaches can be found throughout buildings. They are much larger than the German cockroach, up to 30–55 mm, and they have the ability to fly at night.

Cockroaches typically are nocturnal, if you’ve seen one, you probably haven’t seen them all. The few cockroaches you see by day means they were likely forced out by overcrowding; a possible sign of severe infestation.

Cockroaches have been implicated in the spread of over 30 diseases such as Salmonella, which is a major cause of food poisoning.

How to Tell If You Have a Cockroach Infestation

Cockroaches are extremely hardy creatures and adapt well to residential or commercial properties.

  • Faecal residue
  • Foul odour especially in dark and damp areas
  • Body parts usually limbs
  • Carcasses
  • Egg cases

They are often found in dark, warm places with good humidity which includes:

  • Kitchen sinks
  • Cracks and Crevices
  • Toilets, showers and hot water systems
  • Subflooring and roof voids
  • Wall Cavities
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American Cockroach

Cockroach Pest Control Brisbane  The American cockroach is 1.5 inches long, making them the largest of the house-infesting cockroaches. They generally live in moist areas, but they can survive in dry areas if they have access to water. Moreover, American cockroaches prefer warm temperatures.

In residential areas, these cockroaches live in basements, around pipes and sewers, and may move outdoors into yards during warm weather. Furthermore, these cockroaches can also be found in basements, crawl spaces and foundations.

If you have any issues with cockroaches don’t hesitate to contact an expert now.


First, nymphs hatch from egg cases that the adult female cockroach deposits. Then, as the nymph grows, it sheds its “skin” or exoskeleton so it can get larger. Apparently, each nymphal stage is larger than the previous one. Consequently, an adult cockroach emerges after the last nymphal stage.

To illustrate, the figure shows a simplified image of the life cycle (egg stage, nymph stage and adult stage) of the German cockroach.

American Cockroach

Cock Roach Facts Sydney

Cockroach Life Cycle


There are different cockroaches normally encountered by humans in his dwellings and food establishments. So, the most common of these are the German cockroach (Blattella germanica), the American cockroach (Periplaneta americana), and the Oriental cockroach (Blatta orientalis). In particular, each of these cockroaches undergoes a life cycle involving an egg capsule, a series of nymphs, and an adult.

Cockroach Image Sydney

German Cockroach

With the exception of the female Oriental cockroach, the adults of these three cockroaches have well-developed wings. However, they almost never fly. Hence, movement by both the adults and the wingless nymphs is by walking or rapid running.

These three cockroaches can be distinguished by colour and size. For example, adult German cockroaches are tan to medium brown in color. They are fairly small in size that ranges 10-15 mm. On the other hand, adult American cockroaches are reddish brown in colour and large in size that could be 35-40 mm. Although, Adult Oriental cockroaches are rather fairly large in size that is around 26-30 mm and are shiny, dark brown or black in colour.


Cockroaches require food, water, and places to hide and are, therefore, found in situations where these requirements can be met. Of course, they are nocturnal. In fact, they remain hidden during the day and becoming active at night to obtain food and water and to reproduce.

For instance, the German cockroach commonly occurs in kitchens. However, the American cockroach appears more often in food establishments. The Oriental cockroach, on the other hand, is usually associated with dampness around sinks or in basements.

Cockroaches are not normally encountered by humans unless their populations become very large.

These insects will eat almost anything. Cockroaches can chew almost everything such as left-over human food, wood, leather, cigarette butts, toothpaste, milk, and sugary materials. They may also feast on coffee grinds, glue, soap, faeces, and including fabric. In addition, they can also chew shoes, paint, the glue on the back of the wallpaper, human hair, fingernails, etc.

Image of Large Cockroach Sydney


The German cockroach is the most common house-infesting cockroach and the number one pest in Brisbane.

  • Cockroaches can live without its head for an entire week.
  • The word cockroach comes from the Spanish word “Cucaracha” which means “crazy bug”.
  • There are about 4,000 different species of cockroaches in the world. However, only about 30-50 species live in Australia.
  • The world’s largest roach lives in South America and is 6 inches long with a one-foot wingspan.
  • Cockroaches will eat almost anything. To enumerate, these include left-over human food, paper, wood, leather, cigarette butts, and toothpaste. They also like coffee grinds, glue, soap, feces, fabric, shoes, paint, the glue on the back of wallpaper, human hair, fingernails, etc.
  • German cockroaches are very small. Hence, they can squeeze through a crack that is about 1/16th of an inch wide.

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