Assertion: humpback whale's calf | /r/CapableOf | speak to their mothers
Facets:
value: in muted squeaks
type: MANNER
value: very quietly
type: MANNER
value: softly
type: MANNER
Source sentences:
text: In a recent study published at Functional Ecology, researchers studying the nursing behaviour of humpback whales discovered that calves “speak softly” to their mothers.
text: Using temporary tags that recorded audio from humpback mothers and calves, scientists found that the calves communicated with their mothers very quietly — in muted squeaks compared to the bellows of adult males — perhaps to lower the risk of being overheard and pursued by killer whales, according to a new study.