The German Wikipedia article (https://de.wikipedia.org/wiki/Pfeilstorch https://de.wikipedia.org/wiki/Pfeilstorch) has some more interesting details: there were

The German Wikipedia article (https://de.wikipedia.org/wiki/Pfeilstorch https://de.wikipedia.org/wiki/Pfeilstorch) has some more interesting details: there were 25 documented sightings, but the one from Rostock was the only known taxidermically prepared example - until in 2006, someone rediscovered a forgotten second one in the attic of the Kirchliches Forschungsheim in Wittenberg - however, this stork was found in 1935, so I imagine it didn't contribute as much to the understanding of bird migration as the one found more than 100 years earlier.