Friends, this was a journey across the river near sunset and into evening.  She was bawling for her calf who meandered across the Little Missouri a few feet ahead of her,  She is a mature Bison cow and her splashing in the river got my attention.  I was photographing the sunset in the opposite direction and heard her behind me, I did not test her patience and made my way back to the vehicle.  When it comes to the Bison, I always give them the right of way, living to photograph another day. til Tomorrow MJ