Which statement is most accurate about Australian cockroaches?

• A. They are most prevalent indoors in the United States
• B. They are primarily found in sewer systems
• C. They are equally common indoors and outdoors
• D. They are most prevalent outdoors in south Florida

Answer: (D)

Australian cockroaches thrive in warm, humid outdoor environments, such as leaf litter, mulch, and debris around buildings. In climates like south Florida, these outdoor habitats sustain large populations year-round, so they are most commonly found outside there. They can enter structures, but they are not primarily sewer dwellers, and in many parts of the United States they aren’t the dominant indoor pest. The idea that they’re equally common indoors and outdoors or that they’re mainly indoors in the U.S. doesn’t fit their climate-based outdoors preference, so stating they’re most prevalent outdoors in south Florida best reflects their real distribution.