52. Oriolus, oriole. Beak conical, convex, straight, very acute; upper mandible slightly longer, and indistinctly notched: 20 species.
53. Gracula, grakle. Beak cultrate, convex, bareish at the base: 8 species.
54. Paradisea, birds of Paradise. Beak covered with the downy feathers of the forehead; feathers of the sides long: 3 species.
55. Trogon, curucui. Beak shorter than the head, cultrate, hooked, serrated: 3 species.
56. Bucco, barbet. Beak cultrate, laterally compressed, notched at the tip, incurved, opening to beneath the eyes: 1 species.
57. Cuculus, cuckoo. Beak roundish; nostrils with a prominent margin: 22 species.
58. Yunx, wryneck. Beak roundish, sharp pointed; nostrils concave: 1 species.
59. Picus, woodpecker. Beak angular, straight, the tip wedgeshaped; the nostrils covered with recumbent bristly feathers: 21 species.
60. Sitta, nuthatch. Beak awlshaped, roundish, straight: 3 species.
61. Todus, tody. Beak awlshaped, a little flattened, obtuse, straight, with spreading bristles at the base: 2 species.