Climbing birds are one of the six major ecological groups of birds, covering the order Psittaciformes, Cuckooriformes, Swifts, Mystriformes, Trogons, Nighthawks, Dharmamonformes, and Grebes in the traditional classification system of birds. , climbing birds include nightjars, parrots, cuckoos, swifts, emeralds, kingfishers, woodpeckers, pseudo-woodpeckers and other secondary ecological groups.