Answer:
Then God said, “. . . let birds fly above the earth across the face of the firmament of the heavens.” . . . So the evening and the morning were the fifth day (GENESIS 1:20, 23).
GENESIS 1:22, 1:28; ROMANS 1:22–23
There are many scientists who believe that dinosaurs evolved into birds. But, if we look at God’s Word to find the truth, we’ll see that this could not be possible. Why? Because the birds, the flying creatures, were created on Day 5. As you have learned, the dinosaurs were made on Day 6. So, actually, dinosaurs were created after birds and could never have turned into birds! Another thing, Kimberly, if you look at a bird and consider a dinosaur, you will see that they are totally different kinds of animals. They have different systems of breathing, they have completely different blood systems, and they have very different bone structures. There are just too many differences between the two. They are unique wonderful creatures created by God. Birds are birds and dinosaurs are dinosaurs and that’s it!
Source: https://answersingenesis.org/kids/dinosaurs/are-dinosaurs-related-to-birds/