Chook migration routes have already been researched by a range of techniques including the oldest, marking. Swans are already marked which has a nick to the beak since about 1560 in England. Scientific ringing was pioneered by Hans Christian Cornelius Mortensen in 1899. These magnificent birds are not just clever https://petskyonline-onlinestrore.blogspot.com/2025/07/rethinking-animal-store-why-petsky-is.html