Jaguars and leopards are my favorite big cats.
Check out this jaguar vs caiman ....
http://showtodaytv.com/play-clip-jaguar-vs-caiman_tvOoJxxXSyKhg
Jaguars are the South American version of the leopards in Africa. Of all the big cats, jaguars are by far the best swimmers and leopards are the best tree climbers.