I got an idea. Full size aviary (like a habitat), small aviary (similar function to exhibit) and big bird no need for aviary
North America
Large aviary: Bald Eagle
Small aviary: cardinals
Big bird: sandhill crane
South America
Large aviary: Caracara
Small aviary: some kind of parot
Big bird: Rhea
Africa
Large aviary: Egyptian vulture
Small aviary: African grey parrot
Big bird: secretary bird
Asia
Large aviary: Steller Sea eagle
Small aviary: birds of paradise
Big bird: red crown cranes
Oceania
Large aviary: Polynesian hawk
Small aviary: kookaburra
Big bird: emu
North America
Large aviary: Bald Eagle
Small aviary: cardinals
Big bird: sandhill crane
South America
Large aviary: Caracara
Small aviary: some kind of parot
Big bird: Rhea
Africa
Large aviary: Egyptian vulture
Small aviary: African grey parrot
Big bird: secretary bird
Asia
Large aviary: Steller Sea eagle
Small aviary: birds of paradise
Big bird: red crown cranes
Oceania
Large aviary: Polynesian hawk
Small aviary: kookaburra
Big bird: emu