Ah yes, Areopterix, the Piltdown Bird, or better-than-Piltdown Bird. Discovered by enthusiasts in the back yard as soon as the ink was dry on Origin of the Species and then ........................................................................................................................................................................................................................
The pieces were of other unknown bird-like feathered dinosaurs. The tail turned out to be from a Microraptor.
http://news.bbc.co.uk/1/hi/sci/tech/1248079.stm
Yeah, there are some antievolutionists who think Archaeopteryx fossils are faked, especially the feathers. But this is really dumb stuff, even for creationists.
These fossils were not found in anybody's "backyard". They come from the Solnhofen Limestone of Germany, which has been quarried extensively because of it's unique economic value (e.g. extremely fine-grained texture, used to be used for lithography).
There are 8 or 9 different Archaeopteryx fossils that would have had to have been "hoaxed". One was found before Darwin published, but only recognized (and the feather impressions noted) years later. Others came out of the ground long after the supposed "hoaxing".
The creationist hoax theory theory, however, does give is the interesting (but hardly unique) circumstance of some antievolutionists claiming that Archaeopteryx is 100% reptile, and nothing to do with birds; while other antievolutionists claim that it is 100% bird and not a reptile at all; both groups agreeing only that it is certainly not transitional between the two.