Blackbirds medicine suggests mystery and seriousness, keeping secrets safe and even hinting at magic at work. Blackbird's demand our devotion and commitment first, before they even consider opening up to us. For the shaman, the lesson here is to not give yourself away too easily. Intentions and motives are to be kept protected to a certain degree.
The flight of a blackbird is symbolic of the quest for higher knowledge, The Blackbird is a reminder to keep improving ourselves and to gain a better understanding of the world around us.