Great bustard (Otis tarda) is a large bird belonging to the family Otididae, which includes other species of bustards. It is one of the heaviest birds capable of flight, with males weighing up to 40 pounds (18 kilograms) and females weighing up to 20 pounds (9 kilograms).

Great bustards have a distinctive appearance, with a brownish-grey body, a white belly, and a black and white striped head. Males have a large, inflatable throat pouch that they use in courtship displays. They also have long, white neck feathers that they can fluff up to make themselves appear larger.

Great bustards are native to the grasslands and steppe habitats of Europe and Asia. They are omnivores, feeding on a variety of plants, insects, and small animals. During the breeding season, males establish territories and display to females using their inflatable throat pouches and other behaviors such as wing flapping and jumping.