Rare White Prairie Dogs

I was reading Geek Trivia and it had this question:
"Which of these North American mammals has a sophisticated language system?" 
Elk, Prairie Dogs, Raccoons, or Coyotes
I choose prairie dogs and learned:
Recent research indicates that prairie dog calls, which were long believed to just be simple barks and chirps intended to sound a general alarm, are actually a language system that can communicate a high degree of detail about what is going on in the prairie dog community...specific calls for coyotes and wild dogs, unarmed men and armed men, and they even indicate if a predator is on the ground or in the air. The prairie dogs can communicate not just what the threat is, but what direction it is coming from and at what speed. Plus their vocal nature doesn't increase the risk of getting killed as they project their voices like a ventriloquist and when multiple prairie dogs are repeating the call, it becomes impossible to use your ear to narrow down the location of the animals.

Wow! Then I remembered Tinky Winky and I visiting The Prairie Homestead, Badlands, South Dakota in September of 2002. (Note small white animal, right of center.)

They had many rare white prairie dogs.

They are not albino, they are leucistic, which means their skin and fur lack basic color pigmentation.

And, this area had lots of them.

Here are some additional images I captured on that trip: 

Love those wagon wheels...