Jaguar (Panthera onca) - Woodland Park Zoo's fact sheet on jaguars. - http://www.zoo.org/factsheets/jaguar/jaguar.html
Jaguar: Lord of the Mayan Jungle - Photographic expedition to track and tag the elusive jaguar in Mexico's Yucatan jungle. Mayan history, and jungle ecology. - http://www.oneworldjourneys.com/jaguar/
Nature.ca: Jaguar - Features a drawing, plus a brief overview describing the cat's markings, den preferences, and eating habits. - http://www.nature.ca/notebooks/english/jag.htm
Jaguar - General information and facts from Big Cats Online. - http://dialspace.dial.pipex.com/agarman/jaguar.htm