How do house flies typically appear when at rest?

When house flies are at rest, they typically fold their wings straight back over their bodies. This resting position allows the wings to be neatly tucked away, which may help with protection from environmental factors and reduce the risk of damage. In this position, the wings do not obstruct their body or interfere with their movement as they rest or prepare for flight.

The other positions mentioned in the alternatives describe different behaviors or appearances for other types of insects. For instance, extended wings are seen in some insects when they are preparing for flight or engaging in courtship displays. Similarly, wings bent at an angle or curved over the body could apply to various species but are not typical for house flies specifically when they are at rest. Understanding the resting posture of house flies can help in identifying them, which is useful in various contexts, including pest control and studying their behavior.