However, the evidence for this creature being a bird is compelling. No other creatures except birds have features and a wishbone. The primary feathers are like modern feathers, with an asymmetrical design. As for claws on the wings, three birds alive today have claws as well. The Ostrich has three claws on its wings which could be classified as more reptile-like than Archaeopteryx. Some fossil birds did have teeth and others did not.
In addition, James Jensen, a paleontologist, has found what he believes as modern bird fossils in the rocks where a Archaeopteryx was found (J. L. Marx, Science 199:284(1978)), making it a contemporary of modern birds!
Updated: 9/15/95
References: Berra 1990, 40-43 Gish 1985, 110-117