This picture was taken At chester. Sorry it's a bit blurred, we couldn't get close to the glass. It was for 2 reasons.
1. the zoo has put in a new barrier inbetween the public and the glass
2. There was a large enthusiastic woman flailing her arms around near the mandrill enclosure screaming " look at their mask type faces!!" We heard her later commenting on the greeness of the grass!!!!!!!