Photographing the bison rut.
The bison rut, from late July through August, is an extreme and physically exhausting period for Yellowstone’s bulls, where they lose up to 10% of their bodyweight. The challenges are constant in establishing dominance and retaining their harems. It’s an awesome display of nature and can produce exciting, dynamic photos.
The chase: bulls separate non-willing cows by giving chase and parting them from the herd.
Aggressive dust-wallowing is common.
Carol Polich teaches photography through the Bozeman Adult Community Education program.