Could you pick a white-breasted nuthatch out of a lineup? We explore the value - and limits - of birdwatching, categorization, and measurement.

This episode was produced by Andrew Middleton and Liya Rechtman.

Measure for Measure is a limited series from Ministry of Ideas. The show is executive produced by Liya Rechtman, created by Andrew Middleton, and sound engineered by Greg Fredle. 

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