Assertion: ostrich's wing | /r/HasAspect | 16 primary
Facets:
Source sentences:
text: They have 50–60 tail feathers, and their wings have 16 primary, four alular and 20–23 secondary feathers.
text: They have 50-60 tail feathers, and their wings have 16 primary, four alular and 20-23 secondary feathers.
text: They have 50-60 tail feathers, and their wings have 16 primary, four alular and 20-23 secondary feathers.