Sparrows are a family of small passerine birds, Passeridae. They are also known as true sparrows, or Old World sparrows, names also used for a particular genus of the family, Passer.
Generally, sparrows are small, plump, brown-grey birds with short tails and stubby, powerful beaks.
The sparrows are indigenous to Europe, Africa and Asia. In the Americas, Australia, and other parts of the world, settlers imported some species which quickly naturalised, particularly in urban and degraded areas. House sparrows, for example, are now found throughout North America, Australia (every state except Western Australia), parts of southern and eastern Africa, and over much of the heavily populated parts of South America.