Data from: Broad-scale occurrence of a subsidized avian predator: reducing impacts of ravens on sage-grouse and other sensitive prey

A hierarchical occupancy model adapted from Royle & Dorazio (2008) and Rota et al. (2011) for use in R.分层占有模型（hierarchical occupancy model）改编自Royle与Dorazio（2008）及Rota等人（2011）的相关研究成果，适用于R语言环境。