Eurasian otters recovered dramatically in UK rivers after pollution controls, but face ongoing welfare threats from river degradation, road mortality, and human disturbance.
Otter welfare represents a conservation success story with ongoing welfare challenges to manage. The recovery from near-extinction to national presence is a testament to what pollution control and legal protection can achieve. But road mortality at river crossings, disturbance at breeding holts, and river degradation continue to cause welfare harm. Otter-friendly road crossing structures (ledges within culverts, bankside passes) are well-designed and cost-effective where implemented. Disturbance prevention around known holts during the breeding season prevents litter abandonment. Maintaining clean, rich rivers is the foundation of otter welfare — every improvement in river water quality and riverside habitat helps.