Weasels are small but ecologically important predators that have declined significantly in agricultural landscapes. Understanding their ecology helps inform welfare-positive conservation.
Weasels face multiple welfare challenges in modern agricultural landscapes. Pesticide use reduces prey populations causing starvation, particularly for nursing females with high energy demands. Non-target trapping causes painful deaths and welfare incidents. Road mortality affects dispersing animals. Habitat fragmentation means populations become isolated without sufficient prey to sustain them. Positive welfare outcomes for weasels can be achieved through reduced pesticide use, habitat management creating connected corridors of rough grassland and hedgerows, and trapping practices that minimize non-target species capture.