Nectariniidae or sunbirds and spiderhunters, is a family of passerines. They are small, slender passerines from Old World, with long, usually decurved bill and some species with long tail; many brightly colored, most with some iridescence, particularly in male. They are living from Africa to Australia, across Madagascar, Egypt, Iran, Yemen, Southern China, Indian subcontinent, Indochinese peninsulas, Philippines, Southeast Asian to nearby Pacific Islands and just reaches northern Australia. The number of species is greater in equatorial and tropical areas.