He is best known for his work on the various fossil specimens of Archaeopteryx or "Urvogel", the first known bird.
Wellnhofer's other work includes The Illustrated Encyclopedia of Pterosaurs from 1991.
Wellnhoferia, a bird closely related to Archaeopteryx, or a species of the Urvogel itself, was named in his honour in 2001.
[2] In 2007 a special meeting of pterosaur experts in Munich was dedicated to Wellnhofer, describing him as "the foremost authority on pterosaurs for the last four decades.
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