Never are fossils of creatures found with incipient eyes, with half-way wings, with half-scales turning into feathers, with partially-evolved forelimbs, or with any other nascent or transitional characters. Yet there must have been innumerable individuals which possessed such features, if the neo-Darwinian model of evolutionary history is correct.
The Troubled Waters of Evolution, Chapter IV (pp. 91-92), Creation-Life Publishers. 1974