Which of the following statements about adult crane flies is true?

The statement that adults do not feed at all is accurate regarding crane flies. Adult crane flies are generally known for their lack of feeding behavior. They possess very weak mouthparts that are not suited for biting or piercing, and in most cases, they do not consume food during their brief adult life stage, which can last only a few days to a couple of weeks. Instead, they primarily exist to reproduce.

In contrast, the other statements are misleading. Crane flies do not have biting mandibles, as their mouthparts are not designed for feeding. They also do not feed exclusively on plant nectar; instead, they typically do not feed at all. The notion that they have piercing mouthparts for blood feeding is incorrect, as they are not parasitic insects and do not feed on blood like mosquitoes do. Understanding these characteristics is essential for anyone studying entomology or involved in pest management, especially when distinguishing between different types of insects and their feeding habits.