Coefficients and standard errors for a mixed-effects logistic regression model predicting the probability that bison foraged in a given meadow in winter.

Independent variables included snow water equivalent, missed opportunity costs of foraging in that meadow and not elsewhere in the landscape (), index of wolf presence (absence  = 0, presence  = 1) and log-transformed meadow area. N = 221 surveys in 26 meadows in Prince Albert National Park (Saskatchewan, Canada) during the winters of 1997, 1998 and 2011.