German cockroaches are light brown or tan in color, but may become darker after feeding.
Adult German cockroaches are around 12–16 mm in length. Nymphs are around 4–8 mm in length.
They are oval-shaped and light brown in colour. They have two dark stripes located behind their heads and are about 1/2 inch in length when fully grown. They have six legs, two antennae, and wings that are too short for flight. They are very fast-moving, and can scurry across surfaces quickly.
They do not have the ability to fly.
How to identify German Cockroaches
Identifying German cockroaches (Ootheca, Nymphs, and Adult insects) can be done by looking for certain characteristics.
Ootheca: These are the egg cases of German cockroaches, which are usually brown and oval-shaped. They are about 5-8mm in length and can be found in dark crevices or areas of high moisture.
Nymphs: German cockroach nymphs are light brown to tan in colour and have two dark stripes on their thorax. They are about 6-15mm in length and do not have wings.
Adult Insects: Adult German cockroaches are light tan to brown in colour and have two dark stripes on their thorax. They are about 13-16mm in length and have wings. They are also identifiable by the musty odour they can emit.
In addition to looking for these physical characteristics, you can also use sticky traps to detect German cockroaches. These traps use a pheromone lure to attract the insects and can be used to monitor an infestation.
Habitat, Behaviour, Lifecycle
German cockroaches are commonly found in warm, damp places such as kitchens, bathrooms, and other areas where food is present. They prefer to hide in small crevices and cracks near sources of food and water.
German cockroaches are nocturnal and are most active at night. They will feed on a variety of foods, including crumbs, grease, and other organic matter. They will also feed on starchy materials such as glue, soap, and paper.
The German cockroach has a complete metamorphosis. The female will produce an egg case known as an ootheca, which can contain up to 40 eggs. The eggs will hatch in about 28 days and the nymphs will moult several times before reaching adulthood. Adult German cockroaches can live up to one year.
Why do I have German cockroaches?
The reasons you have cockroaches can be varied, but some of the most common reasons are:
- Poor sanitation: Cockroaches are attracted to food and water sources, so if your home is not kept clean they can easily find a place to feed and thrive.
- Clutter: Cluttered areas provide hiding places for cockroaches and make it easier for them to move around without being seen.
- Openings: Openings such as cracks and crevices in walls and floors can provide easy access for cockroaches to enter your home.
- Pet food: Leaving pet food out can attract cockroaches, as well as other pests.
- Trash: Food waste in the trash can provide a food source for cockroaches.
- Open Containers: Open containers such as cereal boxes and other food containers can provide cockroaches with an easy source of food.
- Water Leaks: Standing water from leaks can attract cockroaches and provide them with a source of moisture.
- Moisture: Areas of high humidity, such as bathrooms and basements, can provide a suitable habitat for cockroaches.
- Warmth: Cockroaches prefer warm areas and will seek out warm spots in your home.
- Neighbours: If your neighbours have cockroaches, it is possible for them to migrate to your home.
Types of cockroaches
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