Possible Clues:

• Flying
• Off the ground
• Winging it?
• Exhibit 'B' being gold and neon on the wing
• Smell servicemen in the river - what's up?
• Are robins endlessly flying, not on the ground?
• Not grounded
• Destined to drown in river, as birds often are
• Speaker's one who'll succeed, having natural ability as a high-flyer?
• Abandoning south, robins are sadly, flying off