Tree Sparrow: Farmland Welfare and Population Decline
Overview: Welfare science for tree sparrows, a farmland bird that has declined by 93% in the UK since the 1970s.
Key Welfare Facts
Tree sparrow populations collapsed by 93% in the UK between 1970 and 2008 due to agricultural intensification.
Loss of winter seed supplies through clean autumn cultivation caused mass mortality from starvation.
Tree sparrows are colonial nesters in tree holes and nest boxes, requiring appropriate nest site provision.
Agri-environment scheme support providing winter seed mixes and nest boxes has stabilised populations in some areas.
Colony stability is critical; once a colony is lost from an area, natural recolonisation is very slow.
Supplementary feeding through cold winters provides direct welfare benefit to struggling individuals.
Welfare Assessment
Tree sparrow recovery depends on targeted agri-environment support providing both nest sites and winter food. Supporting farms in tree sparrow strongholds that participate in bird-friendly management schemes is the most direct action possible.
What You Can Do
Support agri-environment schemes providing winter stubble and seed mixes for farmland birds
Install nest boxes in appropriate farmland settings to support colony establishment
Report tree sparrow sightings to the BTO Breeding Bird Survey
Donate to organisations managing tree sparrow recovery projects