From East Idaho News and the Billings Gazette:

YELLOWSTONE NATIONAL PARK – For the first time in 24 years Yellowstone National Park’s wolf project staff found no evidence in 2018 of wolves killing each other.

That’s unusual since such wolf-on-wolf deaths are the leading cause of natural mortality for the park’s big canines. There was also no evidence of wolves dying from any major diseases, even though mange was found in several coyotes and foxes in or near the park boundary.

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