Related Clues:

• Grackle or grouse
• Grosbeak, for one
• Celtics great
• Cardinal, for one
• Frequent flier?
• One under par
• Bill owner
• Hawk or auk
• Plane
• Boston Celtics legend
• Charlie Parker's nickname
• Nest dweller
• Course coup
• Ptarmigan, for one
• Robin, e.g.