Grizzly Bear 'Super Mom' Gives Birth To Her 17th Cub Despite Her Old Age

399 is famous at her home in the Grand Teton National Park, Wyoming, USA, for being visible at roadsides with her family. It's thought the successful mother learned to use roads and areas popular with tourists to avoid males who can sometimes kill youngsters. The tactic has paid off for 399 who has become one of the most successful documented grizzly parents in history.