The ostrich is the largest living bird and cannot fly due to its size and heavy body. It uses its wings for balance while running at high speeds, reaching up to 45 mph.
Native to New Zealand, kiwis are small, flightless birds with very small wings. They are nocturnal and rely on their excellent sense of smell and strong legs to forage on the ground.
Known for its large size, helmet-like casque on its head, and colorful skin, the cassowary is native to tropical forests in New Guinea. Despite having wings, it cannot fly but is a strong runner and swimmer
Native to Australia, emus are large, flightless birds that use their small wings for balance while running. They can reach speeds of up to 30 mph.
Penguins are iconic flightless birds known for their ability to swim rather than fly. They use their wings as flippers to navigate through water, and their wings are adapted for swimming rather than flight.
Native to South America, rheas are large, flightless birds that resemble ostriches. They use their small wings for balance and protection, but they cannot fly.
Found on the Galápagos Islands, the flightless cormorant has small wings compared to its body size. It has evolved to be a strong swimmer, diving for fish, and is unable to fly due to the underdeveloped wings.