Assertion: winged bat | /r/HasAspect | sac
Facets:
value: in their wings
type: LOCATION
Source sentences:
text: Male greater sac-winged bats (Saccopteryx bilineata) have sacs in their wings in which they mix body secretions like saliva and urine to create a perfume that they sprinkle on roost sites, a behaviour known as "salting".