The New World quails are small birds only distantly related to the quails of the Old World, but named for their similar appearance and habits. The American species are in their own family Odontophoridae, whereas the Old World birds are in the pheasant family Phasianidae.

This group is related to other members of the gamebird family thus.

• ORDER GALLIFORMES
  • Family Megapodiidae: mound-builders
  • Family Cracidae: chachalacas, guans and curassows
  • Family Tetraonidae: grouse
  • Family Phasianidae: partridges, pheasants, quail, and allies
  • Family Odontophoridae
    • Bearded Tree Quail, Dendrortyx barbatus
    • Long-tailed Tree Quail, Dendrortyx macroura
    • Buffy-crowned Tree Quail, Dendrortyx leucophrys
    • Mountain Quail, Oreortyx pictus
    • Scaled Quail, Callipepla squamata
    • Elegant Quail, Callipepla douglasii
    • California Quail, Callipepla californica
    • Gambel's Quail, Callipepla gambelii
    • Barred Quail, Philortyx fasciatus
    • Northern Bobwhite, Colinus virginianus
    • Black-throated Bobwhite, Colinus nigrogularis
    • Spot-bellied Bobwhite, Colinus leucopogon
    • Crested Bobwhite, Colinus cristatus
    • Marbled Wood Quail, Odontophorus gujanensis
    • Spot-winged Wood Quail, Odontophorus capueira
    • Black-eared Wood Quail, Odontophorus melanotis
    • Rufous-fronted Wood Quail, Odontophorus erythrops
    • Black-fronted Wood Quail, Odontophorus atrifrons
    • Chestnut Wood Quail, Odontophorus hyperythrus
    • Dark-backed Wood Quail, Odontophorus melanonotus
    • Rufous-breasted Wood Quail, Odontophorus speciosus
    • Tacarcuna Wood Quail, Odontophorus dialeucos
    • Gorgeted Wood Quail, Odontophorus strophium
    • Venezuelan Wood Quail, Odontophorus columbianus
    • Black-breasted Wood Quail, Odontophorus leucolaemus
    • Stripe-faced Wood Quail, Odontophorus balliviani
    • Starred Wood Quail, Odontophorus stellatus
    • Spotted Wood Quail, Odontophorus guttatus
    • Singing Quail, Dactylortyx thoracicus
    • Montezuma Quail, Cyrtonyx montezumae
    • Ocellated Quail, Cyrtonyx ocellatus
    • Tawny-faced Quail, Rhynchortyx cinctus
  • Family Numididae: guineafowl
  • Family Meleagrididae: turkeys
  • Family Mesitornithidae: mesites