1. Ostrich (Struthio camelus): Ostriches are the largest living birds and can reach heights of up to 9 feet tall. They are native to Africa and are known for their long necks and legs, which they use for running and kicking.
2. Emu (Dromaius novaehollandiae): Emus are flightless birds native to Australia and can grow up to 6 feet tall. They have long necks, powerful legs, and distinctive blue-gray feathers.
3. Greater Rhea (Rhea americana): Greater Rheas are large birds native to South America and can stand up to 8 feet tall. They are characterized by their long necks, slender bodies, and gray-brown plumage.
4. Andean Condor (Vultur gryphus): Andean Condors are among the largest flying birds in the world. They can reach wingspans of up to 10 feet and stand up to 4 feet tall. Andean Condors are found in the Andes Mountains of South America.
5. Kori Bustard (Ardeotis kori): Kori Bustards are large birds found in Africa. They can stand up to 5 feet tall and have wingspans of up to 8 feet. Kori Bustards are known for their elaborate mating rituals, including stomping their feet and inflating their throats.