Chicken eggs do not come from a mammal's mammary glands, and this makes them poultry and not dairy. Eggs are an animal byproduct, and while chicken eggs are considered poultry, eggs from other animals may or may not be, depending on the animal.
Eggs are a staple food in most cultures around the world. More than 62 million tons of hen eggs are produced for consumption every year. While chicken eggs are the most common, humans also eat quail, duck and fish eggs.
Eggs are known for their high protein content as well as being high in minerals, especially choline.