Historical clue formulations

• Scary snake — 2025-08-17
• *Arbiter — 2024-02-22
• One letting you know before going for a bite? — 2018-11-03
• Mojave Desert sight — 2009-05-14
• Slithering danger — 2008-07-17
• Snake that may warn before it strikes — 2003-06-30
• One with forked tongue — 2003-04-05
• Snake in the grass — 2001-11-08
• Herpetologist's subject — 1999-12-29