Dromaeosauridae
The ability to fly or glide has been suggested for at least two dromaeosaur genera. The first, Rahonavis was originally classified as avian bird, but found to be a dromaeosaur in later studies. It may have been capable of powered flight. The forelimbs of Rahonavis were more powerfully built than Archaeopteryx, and show evidence that they bore strong ligament attachments necessary for flapping flight. Luis Chiappe concluded that, given these adaptations, Rahonavis could probably fly but would have been more clumsy in the air than modern birds.