Assertion: frog's sac | /r/HasProperty | vocal
Facets:
Source sentences:
text: Frogs in the genera Heleioporus and Neobatrachus lack vocal sacs but can still produce a loud call.
text: Some frogs even have a vocal sac which fills with air and swells up to make the voice even louder, like an amplifier (refer to picture).
text: Located by its throat, this frog has a vocal sac which expands and deflates like a balloon to create a short and distinct peeping sound.
text: They do this using a vocal sac, which produces sounds unique to their own kind that the females can identify with.
text: The frog inhales, and fills the vocal sac with air, causing it to stretch out like a balloon.
text: The frog inhales, and fills the vocal sac with air, causing it to stretch out like a balloon.
text: " Frogs call by inflating their vocal sacs.
text: The goliath frog lacks vocal sacs.
text: Because the goliath frog lacks a vocal sac, it does not produce mating calls, a behavior generally present in frogs and toads.