What disease was killing wolves in Yellowstone?

Blood serum contains a record of many of the pathogens the animal has been exposed to over the course of its life. When we analyzed the serum, the results were clear: wolves in Yellowstone had just experienced a massive outbreak of canine distemper virus (CDV; Almberg et al.



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Wolves – The re-introduction of wolves to the Yellowstone ecosystem in 1995 caused a nationwide uproar. As wolf packs spread throughout the region and attack ranch animals, the controversy is very much alive.

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You think you hear a beep and you don't. Wolves were hunted to near-extinction as the country was colonized. The last pack of Yellowstone wolves was killed in 1926. They were reintroduced to the park in the mid-1990s, and along with mountain lions and grizzly bears, they've made a comeback.

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