Bitterns are highly secretive reedbed birds that declined to near-extinction in the UK before recovering through targeted wetland management.
Bittern welfare is closely tied to reedbed management quality. Bitterns require extensive reedbeds with shallow water edges and runnels where they can hunt fish and amphibians. Reedbeds that are too uniform, too deep, or poorly connected to open water reduce feeding opportunities and welfare. During cold winters, shallow water freezes over, preventing access to prey and forcing bitterns to seek open water in unusual locations where they are exposed to disturbance and predation. Management of water levels that maintains unfrozen shallow areas during cold spells provides emergency welfare support for resident birds. Recovery of bittern populations demonstrates that targeted management can reverse even severe declines.