What are four adaptations birds have for flight?

1. Wings: Birds have wings that are modified forelimbs covered in feathers. The shape and structure of wings allow birds to generate lift, which is the force that opposes gravity and keeps them airborne.

2. Feathers: Birds have feathers, which are lightweight, branched structures that cover their entire body. Feathers help birds fly by reducing drag, providing lift, and insulating the bird's body.

3. Hollow bones: Most bird bones are hollow, which reduces their weight and allows them to fly more efficiently.

4. Strong flight muscles: Birds have powerful flight muscles that are attached to their wings. These muscles provide the power needed for birds to flap their wings and fly.