A kind is a class of species, such a feline. All cats are of the feline kind, and only kinds can interbreed with others in the same kind. There exists great diversity within kinds as genetic manipulation of dogs and cats have shown, but no matter how we manipulate their genes, they always remain dogs and cats. It is not surprising at all that a saber-tooth and lion belong to the same kind, our gentic manipulation of dog and cat genes has shown that their exists almost an unlimited variation of form within each kind, so that such has been mistaken as evolution is not surprising at all.
Adaptation is clearly observed, if we take 1000 black rabbits and place then up north, in a few generations we will have fat white rabbits, but they will always remain rabbits. They will not become cats. That you have birds with beaks adapted to specific feeding habits is adaptation, not evolution. They have adapted to their environment, but are still of the avian kind and always will be. Exactly why we see no transitory species evolving today, it never occurred. You have observed different forms of the same kind and mistaken that for evolution, yet a Pekinese did not "evolve" from a wolf. The canine kind already contained that genetic information within its DNA, it simply needed brought to the fore. Every canine that has ever lived and every one that may yet be bred is already contained within the DNA for that kind, one merely needs a slight rearrangement of genetic code.
But again, a canine has never been anything but a canine, and will always be a canine till the end of time, even if it does not look like something we today would recognize as a canine. Surely evolutionists are not proposing that the Bambino cat is of a different kind besides feline?