Unless one adheres to the "punctuated evolution" variation, I would ask, "Where are today's 'transitionals?'"
I look around and I don't see the continuum of species variations existent. You would expect this in a system that has been "maturing" for billions of years. Instead, I see species reproducing after their own kind. The genetically flawed are compost.
Punctuated evolution is just another in a series of twists that try to explain away the obvious and maintain a belief in a fundamentally flawed theory.