BLM begins annual C.O. closures to protect birds of prey during nesting BLM (file) Bald eagle perched in tree PRINEVILLE, Ore. (KTVZ) -- The Bureau of Land Management's Prineville District said Monday it has started implementing its series of annual wildlife closures to protect several birds of prey species during sensitive nesting periods. Harassment by humans – unintentional or deliberate – is a leading cause of nest failure or abandonment. People walking or riding near a nest—or even being within view of an eagle on a nest—can cause an adult bird to abandon the nest. This means eggs can get cold, young don’t get fed, and the nest is open to predation.