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The Rostocker Pfeilstorch, found in 1822, demonstrated that birds migrated rather than hibernating or changing form in winter.
The Rostocker Pfeilstorch, found in 1822, demonstrated that birds migrated rather than hibernating or changing form in winter.
A flock of barnacle geese during autumn migration
A flock of barnacle geese during autumn migration
Minoan fresco of swallows in springtime at Akrotiri, c. 1500 BC
Minoan fresco of swallows in springtime at Akrotiri, c. 1500 BC
A flock of common starlings assembling in Geneva, Switzerland, before migrating southwards
A flock of common starlings assembling in Geneva, Switzerland, before migrating southwards