PIERRE, S.D. (AP) — Sylvatic plague that has devastated prairie dog colonies across western South Dakota since 2007 has spread north and east, and the disease is now affecting colonies in the Fort Pierre National Grassland in the central part of the state.
Prairie dog towns are becoming fewer and farther between, grassland wildlife biologist Ruben Mares told the Capital Journal (http://bit.ly/1jep2Wz ). Last year, one colony he monitors had shrunk from 30 acres to 5 acres, he said.
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