Wild By Nature - Madison Valley Montana - Tim Irwin100% of the proceeds will go the Madison River Valley Medical Center Foundation. An exclusive limited edition published by the Madison Valley Medical Center Foundation. Original photographs by Tim Irwin. Tim Irwin first picked up a Nikon at age 15 specifically to photograph wildlife. Thousands of images and 50 years later, his passion for photographing all things wild has only grown stronger and his images more intimate. Through the years Irwin's