sentence: Ostriches can live without drinking for several days.
sentences_before: Ostriches do not have teeth, and so cannot grind food as mammals do. Instead, they swallow pebbles. The pebbles grind the food, and help its digestion. When eating, their gullet is filled with food. After that, the food is passed down their esophagus in the form of a ball called a bolus.
concept_name: ostrich
headings: Ostrich Diet
categories: Ratites Struthioniformes Meats