I'm a firm believer in evolution. That said, I can't imagine what combination of environmental factors would cause a creature to evolve into the black and white harlequin that is the giant panda.
Pandas are maybe the best argument I know for "intelligent design." They are what a whimsical creator might doodle for amusement after a hard day at the celestial drawing board designing more sensible creatures.
Each day the Bing search engine runs a different interesting and/or beautiful photo as its backdrop. The photo today (March 11) is of five playful panda cubs - all piled together and looking at least twice as cute as any earthly creatures have a right to look.
A few days ago seeing a little white fluffy dog on a leash I thought "This is what we have done, starting with wolf puppies, over maybe 10,000 years. Intelligent design via selective breeding by humans." There is, however, no evidence humans had anything to do with the appearance of the giant panda....