Pakistan is home to a notable number of birds species. These vary from resident birds which stay all time around to breeding birds that spend a good fraction of their life in Pakistan to raise their young. Migratory birds also pass through Pakistan with the changing seasons as wintering birds who like to spend a good part of the winter in Pakistan to escape chilly winters of the north. Many species of birds are comparatively common part of the state ecosystem and it is always an adventure to come across a rare bird or outsiders, which does not really form part of any the local ecosystems. These are usually the lost passengers or the displaced by bad weather. From waterfowl to wading birds of the birds of Pakistan one finds a large set of song birds, raptors, swifts, game birds and nighthawks. Many of which occupy several ecosystems simultaneously, flying over the forests, meadows, shorelines of waters, cities and urban green spaces.