A reassessment of Chao2 estimates for population monitoring of grizzly bears in the Greater Yellowstone Ecosystem - van Manen, Frank; Ebinger, Michael; Haroldson, Mark; Bjornlie, Daniel D.; Clapp, Justin; Thompson, Daniel; Frey, Kevin; Costello, Cecily M.; Hendricks, Curtis; Nicholson, Jeremy M.; Gunther, Kerry; Wilmot, Katharine; et al. (2021)