Historical clue formulations

• Lake bird with a laughing call — 2026-07-14
• Minnesota's state bird — 2026-03-18
• State bird of Minnesota — 2026-02-11
• State bird of Minnesota — 2025-07-13
• Crackpot — 2025-04-14
• Bird on the Canadian dollar coin — 2024-12-24
• Diving bird — 2024-12-01
• Bird on a Canadian dollar — 2024-08-04
• Lake bird — 2022-10-26
• Water bird with a haunting call — 2022-08-07
• Diving bird — 2022-04-29
• Bird known in the U.K. as a diver — 2022-01-23
• Bird on the Canadian dollar — 2021-08-30
• Minnesota's state bird — 2020-12-06
• Minnesota's "crazy" state bird — 2020-04-06
• Avian diver — 2019-09-01
• State bird of Minnesota — 2019-07-04
• Symbol of craziness — 2019-05-12
• Bird with blood-red eyes — 2019-01-06
• Bird on Walden Pond in "Walden" — 2018-11-18
• Symbolic bird in "On Golden Pond" — 2018-01-28
• Bird called a "diver" in the U.K. — 2017-11-10
• Wacko — 2017-05-10
• Bird on Canada's $1 coin — 2016-12-07
• Avian symbol of Ontario — 2016-02-05
• Bird with a laughlike call — 2015-08-25
• Nut job — 2015-01-06
• Bird on a Canadian dollar — 2014-05-18
• Wacko — 2014-01-15
• Crazy sort — 2012-02-22
• "Crazy" bird — 2011-08-01
• Screwball — 2010-06-03
• *Kook — 2010-03-02
• Fruitcake — 2010-01-10
• Nut case — 2009-12-29
• "Laughing" bird — 2009-10-07
• Addlebrain — 2008-12-31
• Wacko — 2008-10-16
• Crazy-sounding bird — 2007-12-31
• Crazy — 2007-09-01
• Crackpot — 2007-03-07
• Wacko — 2006-08-29
• Canadian coin image — 2006-06-23
• Diving bird — 2006-05-08
• Crazy as a ___ — 2006-01-02
• Nut — 2005-11-20
• Nut — 2005-09-08
• Web-footed bird — 2005-08-05
• Large diving bird — 2005-08-02
• Sharp-billed diver — 2004-12-05