biology - Feasability of having a voice modulator bioengineered into vocal chords? - Worldbuilding Stack Exchange
The bird voice box is one of a kind in the animal kingdom | Science | AAAS
Roaming Passerines - Bird Calls & Bird Songs - Wysinfo Docuwebs
First birds made honking sounds more than 66 million years ago | New Scientist
Syrinx (bird anatomy) - Wikipedia
Schematic view of songbird syrinx. According to classical theory sound... | Download Scientific Diagram
Fossils Reveal When Animals Started Making Noise | Scientific American
The syrinx - ScienceDirect
Bird Vocalizations : Montana Science Partnership
Syrinx (bird anatomy) - Wikipedia
Anatomy of the vocal organ in non-mammalian vertebrates. (A) Schemes... | Download Scientific Diagram
The vocal organ of hummingbirds shows convergence with songbirds | Scientific Reports
Fossils Reveal When Animals Started Making Noise | Scientific American
Vocal tract anatomy of king penguins: morphological traits of two-voiced sound production | Frontiers in Zoology | Full Text
Birds Reinvent Voice Box in Novel Evolutionary Twist - UT News
Birds reinvent voice box in novel evolutionar | EurekAlert!
Secret of the songbirds: How nightingales, skylarks, robins and other birds create their uplifting melodies - Study Finds
The Scorpion and the Frog: Who Said What? (A Guest Post)
vocal folds
The biology of birds. Birds. 126 THE BIOLOGY OF BIRDS membranes function as vocal cords. Their tension is regulated by muscles attached to the wall of the syrinx. A detailed account
Birds Singing : Twootz.com
No Feather Left Behind: How Do Birds Talk Without Vocal Chords?
Why can parrots talk like humans? Can they imitate any language they hear? - Quora
Syrinx (bird anatomy) - Wikipedia
