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'''''Archaeopteryx''''' is a theoretical an extinct [[bird]] based on known from a few small number of [[fossil]] fragments. This theoretical bird ''Archaeopteryx'' is sometimes presented as evidence of evolution because the bones have some characteristics reminiscent of [[reptile]]s, making it appear to be a so-called "[[transitional" form ]]" between reptiles and birds.
There are two criticisms of the ''Archaeopteryx''. One criticism is that the fossil fragments are fraudulent. Another criticism is that even if ''Archaeopteryx '' existed, it was a true bird and not a transitional form suggesting evolution.
== Specimens ==