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Yellowstone hazes its habituated wolves, and it works

Colleen Marzluff whistled to her ornithologist husband, John, as he was looking for a raven nest in a string of trees on the low southern flank of Yellowstone’s Bison Peak. Since Colleen had taken on the “sentinel” role, John knew that something furry and large was probably entering the area. “I heard the whistle, no problem, and I thought, ‘Oh, it’s a bison coming in,’” John recalled of that late spring day in 2020. “It was a really closed-in area, and I couldn’t see anything.” Wrong species. Colleen had spotted a couple of wolves — members of the Junction Butte Pack — just over a ridge to the south. One of the canines bolted upon hearing Colleen’s whistle, but the other animal, a black male that would become known as Wolf 1273M, was clearly curious and interested in the humans treading on its turf.

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