Among all the birds in this world, sparrows are renowned for their population and their unique blessed voice that highlights their presence from way beyond. Sparrows are of many different species that have a common familiarity, i.e. they are small furry cute birds.  Their species differentiate from one another in subtle ways but all of them are small and have the same behavior all in all. They tend to fly mostly from one place to another and can survive on anything provided to them or that they find. They have a very limited and a small diet comprising of seeds or any small insect. Their species range from Chestnut sparrow, which is the largest in size, comparatively, to the smallest, Parrot-billed sparrow.