Wild Swallow Insect Decline Welfare

Barn and other swallow species face welfare challenges from dramatic declines in flying insect abundance caused by pesticide use, habitat loss, and climate change affecting their food supply.

Key Facts

Flying insect biomass has declined by over 75% in some European regions over the past 27 years
Barn swallow populations have declined by 50% or more across much of their European range since 1980
Swallows catch insects entirely on the wing and cannot switch to alternative food sources
Cold wet summers reduce insect flight activity causing swallow chick starvation
Swallow migration timing is shifting as climate change alters insect emergence patterns

Welfare Considerations

Barn swallows in areas with depleted insect populations face prolonged foraging periods to find sufficient food for themselves and chicks, with chick starvation increasing during cold, wet periods when insects remain grounded. Adult birds unable to find adequate prey experience chronic nutritional stress during the energetically demanding breeding season. Restoring insect abundance through reduced pesticide use, wildflower habitat creation, and retention of traditional farm buildings as nest sites directly improves swallow welfare alongside broader ecosystem health.

What You Can Do

Reduce or eliminate pesticide use in gardens and advocate for reduced agricultural pesticide application
Create insect-friendly habitat with native wildflowers, long grass, and water features
Maintain access to traditional farm buildings that provide barn swallow nesting habitat
Learn about flying insect decline and its cascading effects through aerial insectivore food webs