The name “Bird's milk” was coined in Poland, where they revered the philosophers of Ancient Greece, in particular Aristophanes and his comedy “Birds”, where happiness is promised in the form of milk “not heifers, but birds”.
There are ancient legends where birds of paradise fed their chicks with milk, and if a person is lucky enough to try this milk, he will become invulnerable to any weapon and ailments. Perhaps it is this legend that formed the basis of the Russian proverb, which says: "The rich have everything, shout bird's milk."
(it's me)
