Ospreys were reintroduced to England after a century-long absence, with careful monitoring of individual welfare through GPS tracking helping to protect the growing population from threats.
Individual ospreys tracked via GPS show us the welfare realities of migration: storms causing course deviations, injuries grounding birds in remote locations, and mortality events that can be linked to specific threats. Lead poisoning from eating fish containing lead from fishing tackle causes neurological damage. Birds that survive the demanding trans-African migration and return to breed represent welfare success stories in a population recovering from persecution.