We like to think that all creatures play a role in the local ecosystem. We're especially interested in insects that provide a benefit for people too. But that's not always how it is.
Sometimes, two different animals will evolve to have a similar adaptation, even when they are not closely related. Flight is an excellent example.
From falcons that hunt by the light of skyscrapers, to bears that sit in wait at weirs, animals are using human structures to help them catch a meal.