Birds that are commonly referred to as "perching birds" belong to the order Passeriformes, which includes more than half of all bird species on earth. These birds are characterized by their four toes, three of which point forward and one backward, which allows them to perch on branches and other objects. Some common synonyms for perching birds include songbirds, passerines, or any bird that belongs to the suborder Oscines. These birds are known for their melodious songs, which are used for mating and territorial purposes. Perching birds can be found all around the world and are some of the most diverse and interesting creatures in the animal kingdom.