Gruiformes

Superorder: Passerimorphae
Order: Gruiformes (53/196 – sunbittern, bustards, crowned-cranes, typical cranes, limpkin, sungrebes, trumpeters, kagu, seriemas, rails, gallinules, coots, mesites)

Suborder: Grui
Infraorder: Eurypygides
Family: Eurypygidae (1/1 – sunbittern)

Infraorder: Otidides

Family: Otididae (6/25 – bustards)

Infraorder: Gruides

Parvorder: Gruida
Superfamily: Gruoidea
Family: Gruidae (2/15)
Subfamily: Balearicinae (crowned-cranes)
Subfamily: Gruinae – (typical cranes)

Family: Heliornithidae (4/4)

Tribe: Aramini (limpkin)
Tribe: Heliornithini (sungrebes)

Superfamily : Psophioidea

Family: Psophiidae (1/3 – trumpeters)

Parvorder: Cariamida

Family: Cariamidae (2/2 – seriemas)
Family: Rhynochetidae (1/1 – kagu)

Suborder: Ralli

Family: Rallidae (34/142 – rails, gallinules, coots)

Suborder: Mesitornithi

Family: Mesitornithidae (2/3 – mesites, monias, roatelos)