Short-eared owls are nomadic raptors that depend on vole population cycles for welfare, with breeding success and individual condition closely linked to prey availability across their range.
Short-eared owls in vole crash years face severe food shortages that cause emaciation and breeding failure. Individuals that attempt to breed in areas with insufficient prey exhaust energy reserves. Illegal killing causes acute trauma. The welfare of this species is directly linked to land management practices: open ground maintenance, prey conservation, and end of raptor persecution are the key interventions.