What is the world's largest and heaviest bird?

The world's largest and heaviest bird is the ostrich (Struthio camelus), a flightless bird native to Africa. Adult male ostriches can weigh up to 350 pounds and stand up to 9 feet tall, while females are slightly smaller and weigh around 250 pounds.

Ostriches have long, powerful legs that allow them to run at speeds of up to 43 miles per hour, making them the fastest two-legged animal in the world. They also have the largest eyes of any land animal and lay the largest eggs of any bird species, with each egg weighing around 3 pounds.