Carnivores   Pachydermata   Ongulates   Reptiles   Primates, rodents and others   Birds    Birds of prey    Terrestrial birds    Waders and water birds

This is not a scientific classification of animals : "pachydermata" is an obsolete order of mammals which is no longer in use. I also gathered different orders of animals as primates, rodents and plantigrades and divided birds into 4 categories to make the search easier.