The osprey has made a remarkable recovery in the UK after reintroduction and natural recolonization, with welfare tied to fish availability, persecution, and climate.
Osprey welfare during the breeding season depends on proximity to productive freshwater with abundant fish. Illegal persecution including nest disturbance, poisoning, and shooting remains a threat despite legal protection. Lead poisoning from fish containing lead weights is a documented cause of mortality. Collision with power lines kills ospreys during migration. Secure nest sites, often supported by platform installation, reduce nest vulnerability to wind damage. Climate change affects migration timing and can cause mismatch with peak fish availability at breeding sites.