Swift Nest Sites Welfare: Urban Birds Losing Their Homes

Swifts return to Britain to breed in the same nest sites year after year, but modern buildings are blocking them out. Providing nest sites is one of the most direct urban wildlife welfare actions.

Key Facts

UK swift populations fell by around 53% between 1995 and 2017
Swifts nest in gaps under roof tiles or in old buildings - typically sites over 100 years old
Modern building design and renovation blocks access to traditional nest sites
Swifts are faithful to their nest sites - a blocked entrance forces birds to exhaust themselves searching
They spend their entire non-breeding life airborne - landing only to nest
A pair successfully raising young will return to the same nest for their entire 16-year lifespan

Welfare Considerations

Swift welfare in urban areas is directly harmed by building renovation that blocks nest site access. A returning swift that finds its nest blocked faces a severe welfare crisis - frantically searching for alternatives while time and energy run out during the short breeding season. Each pair that fails to find a nest site that year has wasted the entire migration and breeding season's effort. Fitting swift bricks during renovation is the simplest, highest-impact welfare action available to urban homeowners and councils.

What You Can Do

Fit swift bricks or nest boxes on buildings during any renovation or construction
Never block swift nest sites - check for birds before any roof work
Contact RSPB for free swift brick advice and supplier lists
Advocate for swift nest requirements in local planning policies
Join a local swift group to survey and monitor nest sites in your area