Assertion: red howler | /r/CapableOf | howl at the onset
Facets:
value: at the sound of approaching rain
type: TEMPORAL
value: in response to heavy rains
type: CAUSE
Source sentences:
text: In response to heavy rains, they howl, either at the onset, or often at the sound of approaching rain, and sit hunched over until the rain ends (Clutton-Brock, 1977)!