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'''''Archaeopteryx''''', an extinct [[bird]] known from a small number of [[fossil | fossils]], is considered by evolutionary biologists to be the first species of [[bird]] to appear on Earth.<ref>"Archaeopteryx is the oldest bird in the fossil record." - John Wells [http://www.discovery.org/a/1106] </ref>  

'''''Archaeopteryx''''', an extinct [[bird]] known from a small number of [[fossil | fossils]], is considered by [[evolution|evolutionary]] biologists to be the first species of [[bird]] to appear on Earth.<ref>"Archaeopteryx is the oldest bird in the fossil record." - John Wells [http://www.discovery.org/a/1106] </ref>  

''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.  

''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.