Barn Swallow Conservation and Welfare

Barn swallows are declining across much of Europe and North America due to habitat loss and insect decline. Supporting these aerial insectivores requires understanding their nesting and foraging needs.

Key Facts

Barn swallow populations have declined by up to 50% in parts of Europe over the past 30 years
Swallows are obligate aerial insectivores, entirely dependent on flying insect populations
Pairs typically return to the same nest site each year, showing high site fidelity
Traditional farm buildings with open access points are critical nesting habitats increasingly lost to renovation
Chick survival is strongly correlated with insect availability during the breeding season
Climate change is disrupting migration timing and aligning poorly with insect emergence patterns

Welfare Considerations

Barn swallow decline is driven by cumulative habitat and food losses that leave individual birds unable to meet their nutritional needs during breeding and migration. Hungry parent birds forced to range further for insects produce fewer, lighter chicks with lower survival rates. Each renovation of a traditional building that blocks nest access contributes to this population-wide welfare and conservation problem.

What You Can Do

Leave gaps or install swallow nest boxes under barn eaves and in outbuildings
Avoid disturbing active nests during the breeding season (swallows are legally protected in most countries)
Reduce or eliminate pesticide use that depletes flying insect populations
Create insect-rich habitat around buildings through wildflower planting and pond creation
Support farming subsidy schemes that incentivise swallow-friendly management
Record swallow arrival and departure dates and submit to citizen science schemes