Historical clue formulations

• Was overflowing — 2026-07-05
• Was overrun — 2025-06-21
• Abounded (with) — 2021-06-20
• Was rife (with) — 2021-06-06
• Swarmed — 2021-03-25
• Crawled (with) — 2016-02-27
• Overflowed (with) — 2014-09-15
• Overflowed — 2013-11-03
• Swarmed — 2010-09-26
• Abounded — 2008-11-09
• Swarmed — 2008-02-24
• Overflowed — 2006-09-17
• Swarmed — 2002-04-24
• Swarmed — 2001-05-06
• Was overrun — 1998-01-25