According to Douglas Smith, leader of the Yellowstone Gray Wolf Restoration Project, the concept of predation risk eludes easy definition. (scientificamerican.com)
Linking snake habitat use to nest predation risk in grassland birds: the dangers of shrub cover. (k-state.edu)
Most carcasses and the greatest amount of wolf sign, such as tracks and scat, occurred in thick forests, debris, ravines, and riverbanks, which I had characterized as high predation risk sites. (scientificamerican.com)