Bird migration

seasonal movement of birds

thumb|The Rostocker Pfeilstorch, found in 1822, demonstrated that bird migration|birds migrated rather than hibernating or changing form in winter. A , ; 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.

2001 documentary film by Jacques Perrin, Jacques Cluzaud and Michel Debats,

formation with units arranged in a chevron or "V" shape

electronic archival tracking device

world's first ornithological observatory

system for collecting electronic environmental data

movement of animals to different altitudes

institute for ornithological research and protection

1916 treaty between Canada and the United States

thumb|Garden warbler displays Zugunruhe in the lab

U.S. law to implement the convention for the protection of migratory birds between the U.S. and U.K. (on behalf of Canada)

Alluvial Zone of National Importance in Gambarogno, Gorola, Locarno, Tenero-Contra, canton Ticino, Switzerland

technique to restore migratory routes of endangered birds

research institute in Wilhelmshaven, Germany

mountain pass

phenomenon in bird migration