You have no understanding of fossils or of evolution. The accumulated results of so called microevolution often leads over time to new species. Of course no one mutation leads to another species. That’s an absurd thing to look for and even more foolish to hold up as disproving evolution. Each fossil, at the time of its death was a complete and single individual within a species. Isolated groups of a species, say horses, accumulate changes to the point where they are quite different from horses in other locations that haven’t had contact with the isolated group. Eventually the isolated group can accumulate enough changes that they become a different species (ie. horses and zebras or burros).
Fossils are the preserved remains of once living creatures. Most dead plants and animals leave nothing so fossilization is rare. Lucy died in shallow, relatively still water where she was covered quite quickly by silt. Thus, some forty percent of her bones fossilized. She was quite luckily found as her fossil eroded out and before it was scattered and lost. The odds against such a chain of events occurring are obviously great.
The fossil record is no more complete than a book that has had over half it’s pages torn out and lost. Relationships within and among species can be seen in these fossils, however. As more fossils are found, more can be learned.
A great many bird fossils have been recently found in China. They were preserved in a great detail because, when the birds died, they fell in a shallow fresh water lake. The birds, their feathers and, in some cases, their internal organs were preserved because they sank into an anoxic lake bottom and were covered by silt without much decay. These fossils, covered millions of years and were all before the dinosaur mass extinction.
From these fossils, we have learned that there were a great many different species of ancient birds, only a few of which survived the mass extinction. Many species were quite different from any known bird after the extinction event. They had different skeletal structures than any bird today or any fossil bird found afterwards.
The species from which today’s birds are descended were water fowl who fed in shallows.
And yes, I do have understanding of fossils and evolution. The fact is that there has never been a fossil made which did not occur under rapid burial in anoxic conditions (excepting super rare amber style encapsulations) does not help your theory, but it does help the flood theorists. Especially the mass burials all over the world.