Balut is a fertilized developing egg embryo that is boiled or steamed and eaten from the shell. It is commonly sold as street food most notably in the Philippines, Cambodia and Vietnam. The term comes from the Filipino language.
Partially shelled balut egg showing yolk, fetus and veins running through it
Mallard ducks are used extensively in the production of balut—female (left) and male (right)
Balut in partially broken shells
Balut eggs
Humans and their hominid relatives have consumed eggs for millions of years. The most widely consumed eggs are those of fowl, especially chickens. People in Southeast Asia began harvesting chicken eggs for food by 1500 BCE. Eggs of other birds, such as ducks and ostriches, are eaten regularly but much less commonly than those of chickens. People may also eat the eggs of reptiles, amphibians, and fish. Fish eggs consumed as food are known as roe or caviar.
Fried eggs and carrots with Parmesan and cream
Ancient Egyptian depictions of offerings at the tomb of Menna, including a basket of eggs
Quail eggs (upper left), chicken egg (lower left), and ostrich egg (right)
Collected chicken eggs and quail eggs in a wicker basket