Agreed, except that "Birdwatching Locations" also highlights outdoor venues for watching birds during migration or in natural flight.
Think of this as:
Dairy Queen / Ice Cream Parlours
National Parks of the US / National Parks of the World
Bear or Lion Statues / Figurative Public Sculptures
and many, many others....
Yes, Aviaries fits inside Birdwatching Locations... in much the same way that Florida fits inside the United States.

BQ