“Grizzlies of Pilgrim Creek” is the story of the Grizzly Bear known as #399 which is the most famous mother bear known to man. This video features the photographs by nature photographer Thomas D. Mangelsen taken in and around the Yellowstone and Grand Teton National Parks area with a narrative by American writer Todd Wilkinson. 399 could soon go the way of Cecil the Lion if government regulations regarding trophy hunting are changed. If you enjoyed this wildlife video and want to see another one from Thomas D. Mangelsen watch Polar Bears Playing.