Historical clue formulations

• New World parrots — 2019-03-06
• Colorful birds — 2018-02-10
• Colorful talkers — 2015-06-19
• Easily tamed tropical birds — 2014-05-26
• Colorful parrots — 2014-04-30
• Talkative ones — 2009-03-08
• Cousins of cockatiels — 2008-11-30
• Brilliantly colored parrots — 2007-12-04
• Easily tamed birds — 2005-07-30
• Parakeets' kin — 2003-11-20
• Noisy talkers — 1998-11-14