Historical clue formulations

• Bygone cousin of a kiwi — 2026-08-27
• Down Under bird that scientists are working to "de-extinct" — 2025-12-26
• Bird spotted in eastern Samoa? — 2023-04-06
• Big bygone bird — 2022-02-03
• Bird that went the way of the dodo (before the dodo) — 2021-04-18
• Extinct flightless bird that once grew up to 12 feet — 2020-12-27
• Extinct flightless bird — 2020-12-17
• Extinct bird that grew as tall as 12 feet — 2020-02-22
• Extinct relative of an ostrich — 2019-12-04
• Extinct relative of an ostrich — 2019-09-04
• Extinct cousin of the kiwi — 2017-04-30
• Extinct relative of the kiwi — 2017-04-26
• 500-pound bird hunted to extinction — 2016-03-25
• Extinct wingless bird — 2015-05-10
• Extinct ostrichlike bird — 2013-11-26
• Extinct flightless bird — 2013-04-10
• Big bygone bird — 2012-10-28
• Feathered 500-pounder of old — 2012-10-20
• Extinct kin of the kiwi — 2011-10-06
• Extinct wingless bird — 2011-09-03
• Emu's extinct cousin — 2011-03-22
• Bygone flightless bird — 2010-10-31
• Bird that is no more — 2010-07-25
• Bygone bird — 2010-04-17
• Display in the Auckland Museum — 2010-04-04
• Extinct cousin of the kiwi — 2009-12-23
• Extinct relative of the emu — 2009-08-23
• Extinct kiwi kin — 2006-11-12
• Extinct flightless bird — 2006-10-29
• Extinct relative of the ostrich — 2006-08-23
• Extinct bird — 2004-01-13
• Extinct flightless bird — 2003-11-02
• Bygone relative of the kiwi — 2002-06-16
• Kiwi cousin — 2002-01-05
• Old bird — 1999-05-02
• Extinct kiwi relative — 1998-11-25
• Kiwi's extinct cousin — 1997-11-26
• Extinct cousin of the kiwi — 1995-12-30
• Bygone bird — 1995-04-21
• Extinct bird — 1994-08-21
• Extinct apteryx — 1994-03-12
• Bird that's an anagram of 116-Down — 1994-01-16
• 12-foot bird — 1994-01-08