Common Swift: Urban Conservation Welfare 2025

Overview: Updated 2025 welfare science for urban swift colonies and the building modifications that protect their nesting sites.

Key Welfare Facts

Common swifts nest exclusively in buildings across the UK, making urban building stock critical for their welfare.
Loss of nesting access through building renovation and repair is the primary cause of population decline.
Swifts are highly site-faithful, returning to the same nest holes each year, making access loss devastating.
Swift bricks and nest boxes integrated into building renovations maintain nesting access at low cost.
Planning policy reforms in some UK local authorities now require swift provision in new developments.
Acoustic lures attract prospecting swifts to new nest sites during spring before breeding season begins.

Welfare Assessment

Swift welfare in the urban environment depends on maintaining and creating nesting access in buildings. Supporting mandatory swift brick requirements in planning policy and advising builders about nest protection creates systemic change that benefits colonies at scale.

What You Can Do

Install swift bricks or nest boxes before undertaking building renovation work
Advocate for mandatory swift provision requirements in local planning policy
Use acoustic lures to attract prospecting birds to new nest sites
Report active swift colonies to local recording schemes and swift conservation groups