How can you tell how many unique species you have on Zoo World

Click on the 'Visit Zoo' tab

In the top right corner of your zoo display there is a box with 'Profit Today' at the top and 'My Info' at the bottom. Click 'My Info'

Beneath 'My Zoo' it says 'Animals' then gives the total number of animals you own. Beneath that it says 'Species'; this gives the number of unique species you have.