Historical clue formulations

• Bird in the flycatcher family — 2019-03-12
• North American flycatcher — 2017-03-05
• Bird that's as small as it sounds — 2013-10-09
• Smallish bird — 2012-04-25
• Bird also called a flycatcher — 2003-09-21
• Fly-catching bird — 2002-10-08
• Small flycatcher — 2000-10-14