HomeTracks left by a bird-sized dinosaur suggest it used wings to run faster – Phys.org Tracks left by a bird-sized dinosaur suggest it used wings to run faster – Phys.orgCanada Tracks left by a bird-sized dinosaur suggest it used wings to run faster Phys.org Preserved tracks suggest non-avian dinosaurs used their wings to run New Scientist Expert: Feathered dinosaurs appear to have used wings for speed McGill University