The famous Rostocker Pfeilstorch (arrow storck) from 1822 demonstrated that birds migrated away from Europe in winter to Africa rather than hibernating or changing form (!) in winter. Now common knowledge back then a theory in need of proof. Source: https://t.co/CbOLmySEH6 pic.twitter.com/xcatQnWZmu
— Simon Kuestenmacher (@simongerman600) August 19, 2019