What cases can you think of where is city is relatively large but their zoo is relatively small?
Paris - Zoo is only 15 hectares and 180 species.
Osaka - 11 hectares and 200 species
Mexico City - 17 hectares and 250 species (small for a city of it's size)
and many more...
Note: I did not include London because it also owns the exurban Whipsnade Zoo or Tokyo because it has the suburban Tama Zoo.
Paris - Zoo is only 15 hectares and 180 species.
Osaka - 11 hectares and 200 species
Mexico City - 17 hectares and 250 species (small for a city of it's size)
and many more...
Note: I did not include London because it also owns the exurban Whipsnade Zoo or Tokyo because it has the suburban Tama Zoo.