Since the mid-1990s, so-called blooms of bark beetles have affected nearly 80% of Colorado’s 4.2 million acres of pine forest, reducing decades-old trees into firewood. In the process, they’ve literally laid the groundwork for some of the state’s most devastating forest fires, from the 2016 Beaver Creek Fire in Walden to the 2020 East Troublesome Fire in Grand County. Despite rendering postcard views into wildfire fodder, West does not call these beetles a pest. Like fire, they’re just a part of nature here, filling a vital biological niche in their native habitat. In the long term, experts say they even make forests healthier. “Bark beetles serve as the ecological sanitizers of the forest,” said West, who helps manage Colorado’s 24 million acres of state forestland. One paper, published in the journal Nature in 2020, points to the surprising ways bark beetles are reshaping the landscape, for better or worse.