Assertion: mute swan | /r/HasProperty | the least vocal species
Facets:
Source sentences:
text: Legend to the contrary, swans utter a variety of sounds from the windpipe, which in some species is looped within the breastbone (as in cranes); even the mute swan, the least vocal species, often hisses, makes soft snoring sounds, or grunts sharply.
text: The largest species, including the Mute Swan, the Trumpeter Swan, and the Whooper Swan, can reach a length of over 1.5 m, weigh over 15 kg and their wingspans can be over 3.1 m. Swans utter a variety of sounds from the windpipe, which in some species is looped within the breastbone (as in Cranes); even the Mute Swan, the least vocal species, often hisses, makes soft snoring sounds, or grunts sharply.