Historical clue formulations

• Dabbling ducks — 2024-05-01
• Bluish hues — 2022-03-31
• Bluish shades — 2017-04-23
• Dabbling ducks — 2009-09-14
• Dabblers — 2003-01-25
• Sitting ducks — 2001-09-23
• Some dabblers — 2001-06-22
• Shades of blue — 2000-03-19
• Dabbling ducks — 1999-10-28
• Pond dwellers — 1997-05-29
• Dabbling ducks — 1997-05-28
• River ducks — 1995-09-05