What does "tracheophonae" mean?
Tracheophonae: A group of passerine birds having the syrinx at the lower end of the trachea.
Sources
- Webster's Unabridged Dictionary, 1913 edition (public domain, via GCIDE / Project Gutenberg).
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- Steward: Jason Burns
- Published: 2026-07-17T00:00:00-07:00 · Modified: 2026-07-17T00:00:00-07:00