Wild Swift Welfare and Urban Nesting

Common swifts spend almost their entire lives in the air and face threats from the loss of nesting sites in old buildings, with welfare consequences for one of the aerial world's most spectacular birds.

Key Facts

Common swifts spend approximately 10 months of the year in continuous flight - they eat, sleep, and mate in the air
They return to the same nest site year after year - nesting site loss means abandoning breeding attempts
Modern building renovation destroys swift nest sites - swifts cannot adapt to sealed, renovated buildings
Swift populations have declined 50%+ in the UK over the past 25 years
Swift brick nest boxes installed during renovation maintain nesting opportunities at a cost of a few pounds each
Swifts are legally protected in the UK - disturbing an occupied nest is a criminal offense

Welfare Considerations

The welfare of swifts is intimately tied to nesting site availability. Swifts attempting to nest in a renovated building where access has been blocked make repeated frustrated approaches to sealed apertures, unable to access the nest they are driven to return to. The loss of a nesting site eliminates not just breeding opportunity but represents the loss of a location to which the birds have a strong behavioral drive to return. Swifts nesting in existing sites that are disturbed during the breeding season experience acute stress and may abandon chicks.

What You Can Do

Install swift nest boxes on your home or advocate for their installation during any building renovation
Check for swift nest sites before undertaking any renovation work between May and August
Contact your local planning authority about requiring swift nest provision in new developments
Support organizations like the RSPB and Swift Conservation promoting swift-friendly construction
Learn to identify swifts by their screaming call and distinctive aerial silhouette
Report illegal disturbance of swift nests to wildlife authorities