Wild Swift Conservation and Nesting

Common swifts are in decline across Europe due to loss of nesting sites in modern buildings. Conservation action focused on nesting provision is one of the most effective welfare interventions for this species.

Key Facts

UK swift populations have declined by approximately 60% since 1995
Swifts spend almost their entire lives airborne, landing only to nest
They nest almost exclusively in gaps in buildings - a resource increasingly unavailable in modern construction
A single swift colony can persist in the same building for decades, with birds returning to their birthplace
Swift chicks must reach 44g before fledging to survive their first migration to sub-Saharan Africa

Welfare Considerations

Swift welfare is acutely affected by nesting site availability. Without suitable gaps in buildings, swift pairs cannot breed, causing gradual population decline. Loss of nesting sites is the primary UK driver of swift decline rather than food or migration factors. Nest box provision offers a direct welfare intervention - installed boxes provide immediate breeding sites and colonies can establish within 1-3 seasons using call playback. Building regulations now require swift bricks in new homes in some UK areas.

What You Can Do

Install swift nest boxes or bricks on your home, ideally with call playback speakers
Advocate for your local council to require swift bricks in all new building developments
Report swift colonies to local swift groups so they can be monitored and protected during renovations
Support the RSPB's swift conservation program and local swift groups