Overall, speciation occurred within 15,000 years in 74.2 percent of models that included this preference for mating with other chill wolves, but did not occur in any of the models without mate ...

They used mathematical models capable of simulating evolutionary changes over time based on given inputs, such as the tamest of the wolves mating with other tame wolves.

In Wisconsin, just weeks after gray wolves were delisted from the ESA, an ill-conceived hunt during the wolves’ mating season left 216 gray wolves dead — approximately 20% of the entire wolf ...