What is true about the crane fly regarding its feeding habits?

The crane fly is primarily known for its life cycle and behaviors during the larval and adult stages. In this case, the correct choice highlights that crane fly larvae feed on grass roots. This feeding habit can impact turf health as the larvae are known to damage grass roots, potentially leading to loss of vitality in the grass. It is also accurate that adult crane flies typically do not feed. Instead, they often emerge, mate, and then lay eggs, focusing their energy on reproduction rather than foraging for food.

The other options do not accurately describe the crane fly's behavior. For instance, crane flies do not primarily feed on plant leaves, and while some insects do rely on nectar, adult crane flies aren't typically known for this habit. Additionally, they do not prey on small insects; instead, their role in the ecosystem does not include predation but rather herbivory during their larval stage. Therefore, the assertion regarding their feeding habits in the context of the adult life stage is the most accurate depiction of crane fly behavior.