Assertion: owl's ear opening | /r/HasProperty | 2.3 cm
Facets:
value: in vertical axis
type: OTHER
Source sentences:
text: The outer ear openings, which are concealed by feathers on the sides of the head, are relatively smaller than those of the Eurasian eagle owl, being 2.3 cm (0.91 in) in vertical axis, with the left ear slightly larger than the right.