Selective Design?

Well, of course IDs say would say that the eye, wing, and flagellum are all evidence, however they often fail to recognize two concepts in evolution. these are evolutionary scaffolding and exaptation. In short, scaffolding is the concept that a characteristic evolves around support structures which are then removed, like an arch which is supported until the keystone is put in. Exaptation is the concept that characteristics evolve for one use, but then are used for something else eventually. Then bird wing could be an example of this since the earliest stub could have evolved to keep the bird warm (notice the modern bird which sticks its head under its wing in cold weather)