Knuckleheads WSJ Crossword Clue

Think of a bird that famously couldn't fly and is often associated with foolishness.

????? are extinct flightless birds once native to Mauritius, often used metaphorically to describe someone as foolish or outdated.

The clue 'Knuckleheads' is a colloquial term for people who are foolish or slow-witted. '?????' is a slang term used to describe such individuals, drawing a comparison to the extinct bird known for its perceived lack of intelligence.

Extinct flightless pigeons (don't worry, you've heard of this answer!), Bygone birds, Onetime sights on Mauritius