I don't think I have any pictures of the actual animals, but I attach a picture of the sign that describes them as crested.
Actually, you can ignore me. I do have some pictures of the animals including one clearly showing the rump with a white stripe in the middle. This makes them africaeaustralis and not cristata.
The sign in the image I attached therefore incorrectly lists the species and if the signage when @MOG2012 visited said africaeaustralis then they must have updated it sometime in the two months between our visits which is of course excellent.