Newton's third law states that for every action, there is an equal and opposite reaction. When a bird flies, the wings push air downwards which causes an equal and opposite reaction force from the air pushing the bird upwards, allowing flight. The action-reaction force pairs between the wings and air make bird flight possible.

1. Newton's 3rd Law

2. "For every action, there is an equal and opposite reaction.“ Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first object.

3. Forces always come in pairs (equal and opposite action) What are the forces involved with a bird flying?

4. The wings of a bird push air downwards. The air reacts by pushing the bird upwards. Action-reaction force pairs make it possible for birds to fly.