it is interesting that you mention design process.
I understand the design process as i have engaged in it professionally. You are right i dont understand the design algorithm of evolution as it applies to birds
though at its heart the design algorithm of evolution is
random mutation in the gametes of parent, physical expression in the offspring, greater or lesser productive success of the mutated offspring relative to its peers, = evolutionary adaptation fixed in the population over time.
now it is asserted that this algorithm is powerful enought to account for every single facet of life in the known world today as well as those in yesteryear.
now micro evolution is believed and understood by the scientific community including IDers. so we do know what happens to creatures under this framework. what we see is that mutations are generally harmful to those who have them generally taking away from a very optimal structuring of the creature. we see very limited change nothing of the degree or nature as such physically robust changes as adaptation of arms to wings and transformation from reptiles to feartherd flying creatures. it is you who does not seem to understand the proper constrainst that the design algorithm of evolution actually has been scientificly found to be. no experimentation on reptiles has generated anything like a bird or substantial moves in theat direction the fossil record doesnt help us out and indeed the fossil record has numerous fossils that have actually remained completely oblivious to the supposedly superbodyplan changing powers of the evolutionary design process for the entire history of their life on earth.
I do not believe that the desing algorithm of random mutation and selection of those deformities can generate major reconstruction of body plan on a highly specified construction project such as the formation of a flying animal. nor is there observed or sufficient geologic proof as the debate here shows.
all you have for this particular jump is your hypothesis that isnt even able to generate a step by step hypothetical pathway for the desing algorithm to accomplish this task. you have a conclusion without substantive discussion. birds evolved from dinosaurs ( which dinosaurs and what was the path way) is basicly still open to offers. hardly tight. how many more non explanations for major changes in the animal kingdom are there in evolutionary theory. I bet there are many and i bet by the time i have finished researching them it will look very bad as an explanatory theory.