Recently alarm on the reduction of
- House Sparrow, Passer domesticus and Riv. ital. Orn., Milano, 82 (1-2): 162-164, 30-IX-2013
- Tree Sparrow, Passer montanus
in Northern Europe has been issued by BirdLife International. These species are now classified as SPEC-3 (species of European conservation concern). Decline involves principally urban areas, and varies in magnitude between different areas.