Which cockroach species is found indoors (usually in kitchen and bathroom)?

• A. German cockroach outdoors
• B. American cockroach indoors and outdoors
• C. German cockroach indoors
• D. Oriental cockroach outdoors mainly

Answer: (C)

The key idea here is that different cockroach species prefer different habitats, and the one that most commonly thrives indoors—especially in kitchens and bathrooms—is the German cockroach. They’re small and light brown with distinctive dark stripes, which helps them hide in the tight spaces typical of indoor plumbing areas, behind appliances, under sinks, and in cracks and crevices. The warmth, moisture, and steady food and water sources found in kitchens and bathrooms make these spaces ideal for their survival and rapid reproduction, so they become the most common indoor pest.

In contrast, the American cockroach is larger and often finds favorable habitats in basements, crawl spaces, and sometimes outdoors, though it can enter indoors. The Oriental cockroach tends to be associated with damp, cool areas and is more commonly found in damp basements or outdoors rather than typically in kitchens.