White Stork was a Nazi Propaganda program aimed at gaining support from The Boers in South Africa.

https://www.forbes.com/sites/scotttravers/2024/12/24/in-1942-the-nazi-stork-leg-propaganda-plan-failed-before-it-started-a-biologist-explains-why/

https://en.wikipedia.org/wiki/White_stork#In_culture

In 1942, Heinrich Himmler sought to use storks to carry Nazi propaganda leaflets so as to win support from the Boers in South Africa. The idea for this "Storchbein-Propaganda" plan was a secret that was transmitted by Walter Schellenberg to be examined by the German ornithologist Ernst Schüz at the Rossiten bird observatory, who pointed out that the probability of finding marked storks in Africa was less than one percent, requiring 1000 birds to transmit 10 leaflets successfully. The plan was then dropped.

In Nazi educational propaganda it was also referenced storks stay with storks