Pfeilstorch

File:Rostocker Pfeilstorch.jpg

The Rostocker Pfeilstorch, found in 1822, demonstrated that birds migrated rather than hibernating or changing form in winter.

A Template:Langnf, ; plural , ) is a white stork that is injured by an arrow or spear while wintering in Africa and returns to Europe with the projectile stuck in its body. As of 2003, about 25 have been documented in Germany.

The first and most famous was a white stork found in 1822 near the German village of Klütz, in the state of Mecklenburg-Vorpommern. It was carrying a Template:Convert spear from central Africa in its neck. The specimen was stuffed and can be seen today in the zoological collection of the University of Rostock. It is therefore referred to as the .

This was crucial in understanding the migration of European birds. Before migration was understood, people struggled to explain the sudden annual disappearance of birds like the white stork and barn swallow. Besides migration, some theories of the time held that they turned into other kinds of birds, mice, or hibernated underwater during the winter, and such theories were even propagated by zoologists of the time. The in particular proved that birds migrate long distances to wintering grounds.

Ernst Schüz documented a number of birds with arrows stuck to them: a white-bellied stork collected in Tanganyika, a short-toed eagle in Hungary, a honey buzzard in Finland, and a black kite. He also reported swans and eiders with Inuit arrows. He noted in 1969 that sightings of birds with embedded arrows had declined because of the "unfortunate" replacement of bows and arrows by guns.