The female is much smaller. Institute director Steven Monfort has a reason why the clouded leopard may be rare.

VOA: special.2010.06.22

The clouded leopard is also a subject of research in Front Royal,Virginia, in America's Blue Ridge Mountains.

VOA: special.2010.06.22

The shapes look like clouds. Listen now to sounds from a clouded leopard.

VOA: special.2010.06.22

This leopard is now known as the Sunda or Sundaland clouded leopard (Neofelis diardi), though it was previously and erroneously called the Bornean clouded leopard.

BBC: Earth News - Clouded leopard: First film of new Asia big cat species

As well as the better known clouded leopard living on the Asian mainland (Neofelis nebulosa), scientists determined that a separate clouded leopard species lives on the islands of Borneo and Sumatra.

BBC: Earth News - Clouded leopard: First film of new Asia big cat species

However, genetic studies revealed that there are actually two quite distinct clouded leopard species.

BBC: Earth News - Clouded leopard: First film of new Asia big cat species