Microraptor, from the Dromaeosaur family, was not an ancestor of birds, but it was also unlike any previously discovered feathered dinosaur.

虽然它并不是鸟类的祖先，但小盗龙和先前所发现的带羽毛恐龙并不相像。

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The Dromaeosaur is more primitive than birds, suggesting that feathers developed before flight.

BBC: Dinosaur was covered in feathers

The Dromaeosaur fossil, on loan from China, is being displayed for the first time at the American Museum of Natural History.

BBC: Dinosaur was covered in feathers