So I was watching the birds outside my house flying and made a silly realization, I am a little slow sometimes, when people draw bird wings we tend to try to draw them symmetrically regardless of what the bird is doing but watching these birds fly made me realize how different the wings look depending on what the bird is doing. When they are turning the wing they are turning towards shortens flattens, the wing they are turning away from stretches and lifts if the are gong up, it stretches and drops in angle if they are going down.