During which season do adult cluster flies gather within the voids of houses?

During which season do adult cluster flies gather within the voids of houses?

• A. Spring
• B. Summer
• C. Fall
• D. Winter

Answer: (C)

Adult cluster flies tend to gather within the voids of houses in the fall season as they seek shelter to survive the colder months. During this time, they are looking for a safe place to overwinter. Cluster flies are known to invade buildings as temperatures drop, often finding their way into attic spaces, wall voids, or other sheltered areas. In contrast, during spring and summer, cluster flies are more active outside as they are busy with mating and breeding. In winter, while some flies may be present, the focus of their behavior is typically not on gathering within houses but rather on remaining dormant or hidden until spring returns. Thus, fall is the most accurate choice for when these flies actively seek indoor shelter.

Adult cluster flies tend to gather within the voids of houses in the fall season as they seek shelter to survive the colder months. During this time, they are looking for a safe place to overwinter. Cluster flies are known to invade buildings as temperatures drop, often finding their way into attic spaces, wall voids, or other sheltered areas.

In contrast, during spring and summer, cluster flies are more active outside as they are busy with mating and breeding. In winter, while some flies may be present, the focus of their behavior is typically not on gathering within houses but rather on remaining dormant or hidden until spring returns. Thus, fall is the most accurate choice for when these flies actively seek indoor shelter.