Jacques Gauthier , who named Avialae in 1986 , re-defined it in 2001 as all dinosaurs that possessed feathered wings used in flapping flight , and the birds that descended from them .
Jacques Gauthier named Avialae in 1986 , and first defined it in 2001 as all dinosaurs that possessed feathered wings used in flapping flight , and the birds that descended from them .