Birds' class, also known as Aves, is a taxonomic group of animals that includes all species of birds. Aves is the Latin word for birds and is the scientific name for the class of animals that includes all species of birds. Aves is divided into two subclasses, Palaeognathae and Neognathae, which are further divided into orders, families, genera, and species. Aves is one of the most diverse classes of animals, with over 10, 000 species of birds found in every corner of the world.