If I have wings and can fly, what am I?

The correct choice is that you are a bird. Birds are well-known for having wings and the ability to fly, which is a defining characteristic of this class of animals. Their anatomical structures, including feathers and a lightweight skeletal system, are specifically adapted to facilitate flight.

Other options do not align with the typical characteristics associated with flying animals. Mammals generally do not have wings or the ability to fly, except for certain species like bats, which are not represented in the choices. Insects also have wings and can fly, but the primary interpretation of "wings and can fly" in this context relates more commonly to birds. Fish do not have wings or the ability to fly, as they are aquatic animals adapted to living in water. Thus, the association of wings with birds makes the second option the most fitting answer.