Yanornis is an Advanced Short-Tailed Avialian from early Cretaceous China.  It was about 19.7in (50 cm) long and weighed about as much as a chicken.  Ate fish and possibly plants, too.  A famous hoax claimed the existence of "Archaeoraptor" whose "skeleton" combined the from end of a specimen of Yanornis with the back end of a specimen of the Dromaeosaurid Microraptor.
Yanornis skeleton by franz josef73-d5q59u7

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