Birds store food in the crop. The crop is an expandable pouch-like organ located at the base of a bird's neck that is part of the digestive system. When a bird eats, the food is temporarily stored in the crop, where it can be moistened and softened by saliva. This allows the food to be broken down more easily by enzymes and bacteria in the bird's digestive system.
After the food has been stored in the crop, it moves to the other parts of the digestive system, including the proventriculus, where digestive juices and enzymes are secreted, and the gizzard, where it is ground up into smaller pieces by muscular contractions and the presence of small stones. The cloaca is the opening at the end of the digestive system through which solid waste is eliminated.