Assertion: water moccasin | /r/CapableOf | make loud hiss
Facets:
value: often
type: TEMPORAL
Source sentences:
text: When stressed or threatened, Water moccasins perform a characteristic threat display that includes vibrating their tail and throwing their head back with their mouth open to display the startling white interior; they will often make a loud hiss while the neck and front part of the body are pulled into an S-shaped position.