Yasmin and her mother Irma, the matriarch at the back. In front are Anak, Sibu and Throng Nhi. Anak is daughter of Yasmin and Sibu is the son of Irma. The photo was taken on August 1st, 2004.
Would be great as well, towering over the others. I don't know much about his behaviour though I think Rotterdam has tow bull enclosures and when Alexander was there he only came in contact with the adult females for pairing?