Installing Swift Nest Boxes to Support Declining Populations

Swift populations have declined by over 50% in Britain since the 1990s, with nest box installation a direct action to support breeding pairs.

Key Facts

Swifts nest almost exclusively in buildings, especially older structures with accessible eaves
UK swift populations declined by 58% between 1995 and 2020
Swifts return to the same nest site for life, sometimes for over 20 years
Nest boxes must be positioned at least 5 metres above ground on north or east-facing walls
Calls played through a speaker attract prospecting swifts to new sites

Welfare Considerations

Swifts face welfare threats primarily through loss of nesting sites as older buildings are renovated and gaps sealed. Without suitable nest sites, pairs cannot breed, reducing lifetime reproductive success and ultimately population viability. Installing nest boxes on suitable buildings directly creates welfare-positive outcomes by enabling natural breeding behaviour. Swift colonies also provide ecosystem services through insect consumption, benefiting numerous other species.

What You Can Do

Install RSPB or specialist supplier swift nest boxes on suitable buildings
Play swift calls during April to June to attract prospecting birds
Advocate for swift bricks in all new building regulations
Register swift colonies with local wildlife groups to build population data