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Birds and Reptiles Evolutionists make the claim that birds evolved from reptiles. When we examine the structure of these two living classes, however, we see that this assertion is extremely unscientific.
There are many structural differences between birds and reptiles. The most important one is their bone structure. Dinosaurs, the alleged ancestors of birds, according to evolutionists, have thick and solid bones because of their massive structure. Whereas the bones of living and extinct birds are hollow and thus very light. This light-weight bone structure is very important in the flight of birds.
Another important difference between reptiles and birds is their metabolic structure. While reptiles have the slowest metabolic rate in the world of living things, birds hold the highest records in this field. For instance, the body heat of a house sparrow can rise up to 48oC because of its fast metabolism. On the other hand, reptiles are not even capable of producing their own body heat and instead warm up under the sun. Reptiles are the least energy-consuming animals in nature, whereas birds are the most energy-consuming animals.
The respiratory system of birds also differs greatly from that of reptiles. Reptiles and mammals take air into their lungs through their trachea and then give it back through the same pipe. In birds, however, air makes a one-way journey through the lung channels; it enters from one side and departs from the other. Thanks to this respiratory system that does not exist in any other living class, birds make extremely efficient use of air. This system enables them to fly even at an altitude of 8,000 meters, where oxygen is very scarce. Another characteristic that raises an unsurpassable barrier between birds and reptiles is feathers, a structure specific to birds. The bodies of reptiles are covered with scales, whereas the bodies of birds are covered with feathers.
Put briefly, numerous differences between birds and reptiles definitively refute the evolutionist claim that reptiles gradually evolved into birds. Birds and reptiles are living classes God created to be quite distinct from each other. Alan Feduccia, a professor from the University of North Carolina, strongly opposes the theory that birds have a kinship with dinosaurs on the basis of scientific discoveries, despite the fact that he is an evolutionist himself: Well, I've studied bird skulls for 25 years and I don't see any similarities whatsoever. I just don't see it... The theropod (a major group of dinosaurs) origins of birds, in my opinion, will be the greatest embarrassment of paleontology of the 20th century.33
33- Pat Shipman, "Birds do it... Did Dinosaurs?", New Scientist, 1 February 1997, p. 28  |
Evolutionists
claim that birds evolved from small-structured, reptilian dinosaurs.
A comparison between birds and reptiles, however, demonstrates that
these living classes are very different from each other and no evolution
whatsoever could have taken place between them. 
In
the world of vertebrates, reptiles are one of the groups
that least resemble birds. While birds are warm-blooded,
reptiles are not even capable of producing their own body
heat. With the structure of their skin, their metabolism,
and their skeletal system, reptiles are ultimately created
to live on land. 
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