They attract you because of their instinctive knowledge, and they represent the inner freedom that man is in the process of objectifying on a conscious level. They also remind you of the deep certainty of your creaturehood, and by their flight evoke within you the knowledge that you are leaping from creaturehood into dimensions of actuality you only barely sense.
Their migration is perfect in its simplicity and complexity, yet your journey as a species is far less predictable, opening avenues of probabilities in which your consciousness and free will allows you to become conscious creators in worlds that you initiate and then inhabit.
Seth gave the above response when asked the question: Why are we fascinated by birds, in this case geese flying in formation?