Thumbtack, a name given by a human even though it was much rather the human taking an object from the bird and saying what the object was aloud. The bird spent a lot of time with other species, as some of his flock did. Mostly for food and safety. He spent time looking for an animal to, as his flock would say 'share a bond' with. For his protection, and as they put it a spiritual sort of bond with said animal. What this animal was, he never knew. Tack left the flock eventually, to find this animal to share this bond with. This led him to Teekon.