The authors examine the impact of environmental and political variables on two measures of species imperilment across 49 U.S. states: the fraction of all species in a state identified by NatureServe as being "at-risk" of extinction, and the fraction of species in a state listed under the U.S....

"We examine the impact of hunting and fishing on rankings in NatureServe's 2005 "at-risk" list using 24,291 observations on individual vertebrate animal species for 47 states (we omit Alaska, Hawaii, and Missouri). We use 1) a probit analysis of the binary "at-risk" designation and 2) an ordered...