Do you know when Whipsnade stopped keeping them( the year) and what happened to them?
Unfortunately, I don't know, but I will try to find out.
The ZSL Annual Reports did not give a full species list until 1977; prior to that the lists only showed animals born or received. By the time the full species list was published in the 1977 report there were no white-tailed gnus in the collection.
Sadly, today, the ZSL doesn’t provide any sort of species list in its Annual Report.....