No, that is not true. On the other hand, from the evidence presented by those who are educated as scientists, they may see and believe what they deem to be evidence, but no one has really seen any transition between animals and by that I mean in the broad scope. They may say, ok, evolution is true-proved-yes, proved because beaks change, but really, they are still birds. They do not evolve to something other than birds.
They may also say that dinosaurs became birds because of feathers they think were embedded in fossils, but there is no evidence (I dare not say proof, of course -- because there IS none anyway) that dinosaurs evolved to become birds. Embedded feathery impressions said to be precursors to birds do not add up to actual evidence that dinosaurs evolved to become birds. It may seem that way in a scientist's mind, but there is a dark hole in the supposed progression. I used to believe what I was taught in school about evolution. I believed it because I had no other way of looking at it. But now I realize that scientists go by a theoretical model and try to fit in pieces they believe fit in as evidence of the process. And as we know, sometimes their theoretical assertions change.
Scientists look to fossils and evolutionary trees to help determine the rate of evolution -- albeit with conflicting results. A new model has helped to resolve these contradictions.
www.sciencedaily.com
Then it has been explained to me, well, that's science. things change, things are discovered, etc. The previous conclusions were, however, taught as truth and not possibilities.