Assertion: night snake | /r/CapableOf | vibrate the tail - appearing
Facets:
value: as a viper
type: MANNER
Source sentences:
text: Behavior: When disturbed, the night snake may flatten its head, coil tightly, and vibrate the tail - appearing as a viper (see photo).
text: When disturbed, the night snake may coil tightly and vibrate the tail - appearing as a viper