Earlier quoted context omitted.
So do humans, babies and the elderly especially. What has 4 legs in the morning, 2 in the afternoon, and 3 in the evening? The key here is how relaxed is the interpretation of "permanent".
Birds migrating are mostly zero legging it! To answer the question: a yacht race?
(Aside from AI Yacht's, of course: https://www.youtube.com/watch?v=U79-kDQnbPE )