Tatanka (Sioux for American Bison) - We spent an additional day prowling through Custer State Park for wildlife and immediately ran into a major herd of about 250 head. New animals added to the list included a marmot - unexpected at this moderate altitude! We also drove the Needles Highway to Sylvan Lake, where we ate lunch and walked the perimeter trail. Then, back to the main park, where we caught this fine fellow. We named him Weldon, after a dear friend.