Historical clue formulations

• Aviary inhabitant — 2026-07-21
• One making calls on the fly? — 2026-05-09
• With 41-Across, a hint to this puzzle's theme — 2025-07-24
• National Audubon Society subject — 2025-07-03
• Tweety, Woodstock or Woody Woodpecker — 2025-02-10
• Ornithologist's interest — 2024-07-30
• Frequent flier? — 2022-11-01
• Twitter icon — 2022-07-27
• Early morning caller — 2022-07-15
• Loon or dodo — 2022-04-04
• Swallow or duck — 2022-03-23
• It may be flipped in anger, with "the" — 2021-09-23
• Twitter logo — 2020-12-30
• Middle finger, with "the" — 2020-09-17
• Something "in the hand" that's "worth two in the bush" — 2020-09-14
• What might come down to the wire? — 2020-08-23
• Owl or osprey — 2020-01-08
• Frequent tweeter — 2018-03-31
• One with a lot of tweets — 2017-02-12
• Frequent flier — 2016-08-10
• Frequent tweeter — 2016-07-14
• PBS has a big one — 2013-02-24
• Frequent flier — 2010-12-17
• Aircraft, informally — 2010-11-14
• Ostrich or owl — 2009-12-28
• Tweety ___ of Warner Bros. cartoons — 2008-10-27
• Word with early or whirly — 2008-04-23
• Wren or hen — 2008-04-08
• Robin or swallow — 2007-09-10
• Cardinal, for one — 2006-03-15
• Nest builder — 2003-01-20
• Country singer? — 2003-01-12
• Feeder frequenter — 2001-09-07
• Flier — 2001-02-08
• One filling the bill? — 2000-11-03
• Wren or hen — 1999-10-12
• N.B.A. M.V.P., 1984-86 — 1999-03-17
• Shuttlecock — 1999-01-03
• Wren or hen — 1996-12-23
• Basketball's Larry — 1994-11-28