Historical clue formulations

• Lawyer in "To Kill a Mockingbird" — 2023-09-21
• Bird whose beak inspired Darwin's theory of evolution — 2020-12-08
• Purple ___ — 2005-03-05
• Seedeater, say — 2002-02-01
• Bunting or sparrow — 1999-05-12
• Peck's Oscar role — 1996-09-14