For a truly baffling long distance migration check out the Monarch butterfly, it takes multiple successive generations to complete the entire migration route. One generation travels a distance procreates and dies before its offspring are hatched, then those offspring travel another distance and do the same, repeated throughout the entire migration. There is no opportunity for the information regarding the entire migratory endeavor to be passed between generations except through some genetically coded information. Nothing is taught or learned it’s all predestined instinct.