Why Are There So Many Black Wolves In Yellowstone?

Black wolves are either absent or very rare in most parts of their range, but are mysteriously common in some parts of North America

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Members of the Druid Peak Pack in Yellowstone National Park engage in a game of chase. The gray colored wolf on the left represents the homozygous gray phenotype, whilst the black colored wolf on the right represents the K-locus black phenotype. (Credit: Daniel Stahler / National Park Service)

Black wolves are among the most iconic animals at Yellowstone National Park. People travel from around the world to Yellowstone to catch a…