Dear Dr. Liefke and Director Frankfurt Zoo, On my visit to the Frankfurt Zoo on July 1st 2016 I was shocked by the devastating habitat conditions the poor single rhino is living in. See picture. On a small acreage of a couple hundred square feet with one! single tree the poor animal had only a corner where it could rest. Make sure to give that animal to a new habitat or retirement facility in a better place . Your Zoo is not the place to “live” for this highly endangered species. Sincerely Dr. Dr. Alexander Massing , Spechtstrasse 2a, 63110 Rodgau,Germany Tel. 06106 6398257