Common Ostrich (Struthio camelus): The largest and heaviest bird in the world, the common ostrich can reach up to 9 feet (2.7 meters) in height and weigh around 220-350 pounds (100-160 kilograms).
Image Credits: Google
Somali Ostrich (Struthio molybdophanes): Closely related to the common ostrich, the Somali ostrich is slightly smaller but still an impressive bird.
Image Credits: Google
Common Rhea (Rhea americana): The largest bird in South America, the common rhea is flightless and can grow up to 6 feet (1.8 meters) tall and weigh up to 80 pounds (35 kilograms).
Image Credits: Google
Southern Cassowary (Casuarius casuarius): The largest bird in Australia and the second-largest bird by height in the world, the southern cassowary is a flightless bird that can grow up to 6 feet (1.8 meters) tall and weigh up to 160 pounds (73 kilograms).
Image Credits: Google
Andean Condor (Vultur gryphus): The largest flying bird in the world by wingspan, the Andean condor has a wingspan that can reach up to 10 feet (3 meters) and can weigh up to 33 pounds (15 kilograms).