When looking through the 71 "Cougar" images at Acclaim Images.com this Alert Cougar on Log was a favorite.
All of their pictures are hand picked, availiable in a number of formats, and you can even get custom prints and posters.

Description:
Alert Cougar on Log
An alert cougar on a log.

Some related terms for more images:
mountain lion,  wildlife,  animal,  big cat,  cougars,  animals,  puma,  wildcats,  wild cats,  cary ulrich,  mountain lions,  pumas,  big cats,