The finding of quill knobs on fossilized velociraptor bone demonstrates that even large dinosaurs were feathered and may have descended from animals capable of flight. Scientists have known for years that many dinosaurs had feathers. Now the presence of feathers has been documented in velociraptor, one of the most iconic of dinosaurs and a close relative of birds.
Dinosaur Fossil Shows Signs of Early Flight Mechanism

Quill Knobs on Velociraptor