Effects of avian mobbing on roost use and diet of powerful owls, Ninox strenua

Mobbing is a prey behavior wherein prey conspecifics gather around a predator and exhibit vocal and visual displays as an anti-predatory defense behavior. The effect of bird mobbing on the choice of roost and prey selection among the powerful owls Ninox strenua was investigated. Results indicate that these owls roost more often in rainforests which are relatively inaccessible to mobber avian species. Further, owls prey on non-mobbers more often than they do on mobbing species.