The following shots of a Jaguar were taken at the Cat Survival Trust in Hertfordshire. A fantastic looking big cat and although elusive on the day, probably due to the dismal weather, a small opportunity eventually presented itself. Many more details here: http://www.catsurvivaltrust.org/default.aspx
Here are a few shots of a Puma (aka mountain lion, panther or indeed cougar) taken at the Cat Survival Trust in Hertfordshire. This unique and stunning looking specimen is the second largest cat in North America with the largest being the Jaguar. Amazingly, for such a large cat the puma cannot roar, instead it growls, purrs and hisses just like a domestic cat.