[DittoJed2]

No they are not. Sometimes they are a loss of information (e.g. excisions), sometimes they are a change in information (e.g. point mutations), sometimes they are a gain of information (e.g. duplications).
Duplications does not equal the kind of added information that evolution requires.

Why isn't it a dinosaur with a bit of a bird? For the same reason that a dog with fur and a long tail is not a "bit of a cat." They are two different kinds of creatures.

[Physicist]

a dog with fur and a long tail is not a "bit of a cat." They are two different kinds of creatures.

That's an arguable point. Compared to a squid, dogs and cats are nearly identical. Is a grizzly bear "a bit of a black bear"?

[<1/1,000,000th%]

Why isn't it a dinosaur with a bit of a bird?

FYI. Most creationists would argue with you since there are no transitional forms.