Historical clue formulations

• Kiwi or cassowary — 2024-06-02
• Ostrich, e.g. — 2013-05-11
• Flightless bird — 2011-03-18
• Many an Australian bird — 2010-07-01
• Kiwi, e.g. — 2010-06-11
• Rhea, e.g. — 2005-09-16
• Kiwi, e.g. — 2001-12-15
• Emu or ostrich — 1995-06-07