In 2002, Hwang "et al." found that "Microraptor" was the most primitive dromaeosaur. Xu and colleagues in 2003 cited the basal position of "Microraptor", along with feather and wing features, as evidence that the ancestral dromaeosaur could glide. In that case the larger dromaeosaurs would be secondarily terrestrial—having lost the ability to glide later in their evolutionary history.