Wildlife

Wild Barn Swallow Decline UK

Barn swallows have declined significantly in the UK due to reductions in flying insects. Understanding their ecology helps target conservation interventions.

Key Facts

UK barn swallow populations declined by approximately 46% between 1970 and 2019
Flying insect declines are the primary driver of reduced breeding success
Swallows traditionally nested in farm buildings but outbuildings are increasingly sealed
Nest cup provision can replace lost natural sites
Late arriving migrants find fewer insects in cool springs

Welfare Considerations

Swallow chicks starved by insect scarcity suffer directly. Adults unable to find sufficient food for breeding have reduced reproductive success and body condition. Maintaining insect-rich habitats through reduced pesticide use and hay meadow management supports the insect communities that swallows depend on for welfare and survival.

What You Can Do

Create insect-rich habitat through wildflower areas and reduced mowing
Provide access to suitable nesting sites in outbuildings
Record swallow arrival and departure dates through BTO surveys