Historical clue formulations

• Bottom ___ — 2022-04-21
• One hanging around the yard — 2020-04-26
• The Missouri, to the Mississippi — 2013-05-11
• Starfish or sea cucumber, e.g. — 2011-12-15
• Holder of birdseed — 2011-07-11
• Tributary — 2007-12-15
• Tributary — 2004-08-02
• Bird seed holder — 2003-10-27
• Tributary — 2003-02-16
• Tributary — 1999-08-27
• Farm trough — 1997-01-07
• Branch railroad, e.g. — 1996-12-29
• Tributary — 1994-08-17