Spanish sparrow
The Spanish sparrow is a close relative of the house sparrow in the genus "Passer" and the sparrow family Passeridae. Its taxonomy is greatly complicated by the "biological mix-up" it forms with the house sparrow in the Mediterranean. In most of the Mediterranean, one or both of the two species occurs, with only a limited degree of hybridisation. On the Italian Peninsula and Corsica, the two species are replaced by the Italian sparrow, a puzzling type of sparrow apparently intermediate between the Spanish sparrow and the house sparrow.