An adaptation originates at the same time as its selection pressure.

Isn't it so that an adaptation originates at the same time as the selection pressure that creates it?

Take the evolution of flight for example.

There are two steps to consider.

1 When an animal doesn't do anything resembling flying, or something that can later be called flying, there is no selection for flying. Even if it is beneficial, as well as possible, for an animal to evolve wings and take off, there is no selection for flying until it does something resembling flying.

2 When an animal starts to do something that resembles flying (dropping out of a tree in a more controlled manner for example, or jumping up and down during a mating display), there will, likely, be selection for flying. There can only be selection for flying if an animal does something resembling flying. The flying and the selection for flying originate at the same time.
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