Shadow of Dark Bird, or "Bird" for short, is the son of Field of Sunlit Rye (Rye) and Mask of Keen-Eyed Magpie (Magpie). He was born to the alpha pair, and thus he sometimes takes his position too seriously. He is quite reserved and pessimistic due to having a few anxiety disorders, but he opens up a lot when he's around his family, and he especially enjoys the company of his more kindhearted father, Rye.
Though Shadow was the firstborn of the litter, and thus should have been the heir for the position of breeding male, his pessimism and nervous demeanor dragged him down. Buck was instead picked to fill Shadow's pawprints, and Shadow was happy to give the position to his brother. Shadow is more interested in the work he was destined for, anyway—he likes the idea of quietly sorting herbs on his own, and diagnosing illnesses bitterly.
When he came of age to move out of the puppy den, he was greeted warmly by his fathers, who showed him to the medicine den. Since the previous temporary herbalist had broken in the den with a good supply of all sorts of herbs, he was able to settle into the position nicely.