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.