Buffalo (Bison) is a lean red meat that is flavorful, not gamey, and makes delicious burgers. A great source for high quality grass fed Bison is Wild Idea Buffalo. Their site has good nutritional information and an interesting review of the the history of Bison.
Buffalo can be a bit dry as it is so lean. Adding in a source of fat, preferably healthy fat like olive oil, avocado etc, will ensure good tasty, moist burgers. I just pulled out what I had in the fridge-some scallion, avocado and blue cheese-and whipped up some quick, mid-week burgers.
