These Two Bird-Sized Dinosaurs Evolved Bat-Like Wings, but Struggled to Fly SciTechDailyBat-winged dinosaurs were clumsy fliers Science NewsThe first flying dinosaurs were a failed evolutionary experiment New ScientistTwo bird-sized dinosaurs evolved the ability to glide but 'weren't great at it', study shows Daily MailThese two bird-sized dinosaurs evolved the ability to glide, but weren't great at it Phys.orgView Full Coverage on Google News