Since evolutionists believe that birds evolved in some way, they claim that they are descended from reptiles. One of the theories they propose to account for the origin of flight is that reptiles developed wings while attempting to catch flies. In fact, however, birds have totally different structures from those in terrestrial animals. No physical mechanism can be accounted for in terms of gradual evolution.
First of all, the flawless structure of the wing, the evolutionary main distinguishing feature of birds, represents a major dilemma for evolutionists. The question of how the wing could have developed as the result of consecutive random mutations is one that evolutionists cannot answer. Evolution is unable to explain how a reptile's front legs could have turned into wings as the result of some mutation arising in its genes. No new organ can form as the result of mutations, and any reptile would be naturally disadvantaged if its forelegs lost functionality. (See The Origin of Wings and The Origin of Flight.)
In addition, simply possessing wings is not enough to turn a terrestrial animal into a bird. Land dwellers lack many of the structural mechanisms that birds use to fly. For example, avian bones are much lighter than those of terrestrial creatures. Their lungs have a wholly different structure and function. Birds have different muscular and skeletal structures, as well as far more specialized heart and circulatory systems-mechanisms that cannot form gradually, being added to one another.
Evolutionists who maintain that dinosaurs developed wings while chasing flies cannot explain how those flies developed wings in the first place. Yet according to their own claims, the flies' wings in their most complex forms must have come into being through various mutations. This clearly demonstrates that the claims of evolutionists are simply fictional. In addition, no fossil record confirms this unscientific tale. There are thousands of perfectly formed bird fossils, but not a single example of bird-like creatures, with half-developed wings, has ever been found.Arboreal Theory
The idea that dinosaurs turned into birds by growing wings as they hunted flies is not a comic story, but in fact, evolutionist theoreticians’ most serious thesis regarding the origin of birds.
This is one of the two main explanations proposed by evolutionists as to how terrestrial reptiles began to fly. According to this theory, reptiles took to the air vertically, by hopping from the ground. The basic concept is that certain reptiles flapped their forearms very rapidly and for long periods as they chased insects, and that over the course of time, these forelegs developed into wings. Not the slightest explanation is offered, however, for how such a complex structure as a wing could have come into existence from forearms being beaten against one another in order to trap flies.
John Ostrom, a prominent adherent of the cursorial theory, admits that the proponents of both hypotheses can do no more than speculate: “My cursorial predator theory is in fact speculative. But the arboreal theory is also similarly speculative.” 104 (See Arboreal Theory, the.)
Even if we assume that mutations did cause undirected changes in a reptile’s forearms, it is still irrational to expect that any wing could emerge by chance through the addition of cumulative mutations. Any incremental mutation taking place in its forearms would not endow the reptile with functional wings, but would leave it deprived of functioning forearms. This would leave the animal disadvantaged (in other words, defective) compared to other members of its species. According to the rules of the theory of evolution, that deformed creature would be eliminated through natural selection.
Furthermore, according to biophysical research, mutations take place only very rarely. Therefore, it is impossible for these deformed creatures to wait millions of years for their deficient, incomplete wings to be completed through minute mutations.
104 John Ostrom, “Bird Flight: How Did It Begin?.” American Scientist, p. 47.2009-08-15 19:32:30