Flightless Birds

Whenever you watch a nature show about penguins or read a book about ostriches or any other "flightless bird", you usually hear something about how these animals have lost the ability to fly as a result of evolution, and their wings are useless appendages left as a reminder of their flying ancestors. But this thought is actually contrary to the theory of evolution. Evolution requires that new genetic information be added to create new species. Loss of flight would result from loss of information not an addition of information and, thus, not from evolution.
While it is possible that these animals may have been able to fly in the past and then through isolation of gene pools and natural selection lost the ability, this is only a theory about what happened in the past. The wings on these animals, however, are observable, and through observation, we can see that they are not useless. On the contrary, they have many uses including helping them balance as they walk or run, an intimidation tactic as they scare off predators, showing off to get a mate, protecting their abdomen and protecting their young.
There are no vestigial organs in any creature. God created plants, animals and people and all their parts with a purpose, because He, being an all wise God, knew what we would need to survive.