Two specimens of a feathered dinosaur, Sinocalliopteryx have been found in China, and both contain direct evidence of what they preyed on. One specimen contains 3 Confuciusornis specimens (an early bird), whilst the other contains a Sinornithosaurus (closely related to Microraptor).
Both of these are firsts, both the first time multiple birds/feathered dinosaurs have been found as stomach contents, and also the first time a raptor-dinosaur has been found as prey.
http://www.sciencedaily.com/releases/2012/08/120829171943.htm
I'm currently trying to get a link to the original paper
Both of these are firsts, both the first time multiple birds/feathered dinosaurs have been found as stomach contents, and also the first time a raptor-dinosaur has been found as prey.
http://www.sciencedaily.com/releases/2012/08/120829171943.htm
I'm currently trying to get a link to the original paper