Animal Orders are subcategories which specifically refer to a grouping or sub-grouping of animals based on their taxonomic characteristics. On the order of biological ranks, Animal Orders is between Class and Family, and is the fifth of eight biological taxonomic ranks. There are 19 orders of mammals in the world, most living in North America. These orders include Order Cetacea, which is made up of whales who have a form of teeth. These orders also include meat eating Carnivora, which includes dogs and wolves, and order Artiodactyla, which includes giraffes and farm cattle. The following collections have been organized to better understand and browse the collections of animals by their orders.