'She is so old': One-eyed wolf in Yellowstone defies odds by having 10th litter of pups in 11 years

One eyed wolf walking on thick snow next to a camera set up on a trail.

The alpha female of a Yellowstone gray-wolf pack has defied the odds by having a 10th litter of pups at the age of 11. 

The one-eyed wolf elder, named Wolf 907F, gave birth to her latest litter last month, the Cowboy State Daily reported. Gray wolves (Canis lupus) have an average life span of three to four years, so it's rare for them to reach 11, let alone have pups at that age.