The Color of Wolves Mysteriously Changes Across America. We Finally Know Why
1st January 2023
Guessing the color of the coat of a gray wolf seems like a no-brainer. But the canines, whose habitats are spread across North America and Eurasia, aren’t always actually gray.
On the North American continent, specifically, the farther south you go, the more wolves there are with dark, black-hued coats. The phenomenon was unexplained for a long time, but now scientists have determined that the culprit is one of the biggest drivers of natural selection: disease.