Britain's swift population has declined by 68% between 1995 and 2023, according to the RSPB. These birds, which spend nine months of the year in flight and migrate from sub-Saharan Africa to the UK, are beloved for their aerial displays and association with summer. Conservationists are urging the public to help reverse the decline through simple actions.
Loss of nesting sites is a key factor, as modern building practices reduce the nooks and holes swifts need. Insect decline, exacerbated by climate volatility, also affects their breeding success. The RSPB's Dr Guy Anderson notes that periods of bad weather linked to climate change impact swift reproduction.
Hannah Bourne-Taylor, author of 'Nature Needs You: The Fight to Save Our Swifts', encourages people to become 'nest detectives' using the RSPB Swift Mapper app. This citizen science tool records sightings of nesting swifts and has over 100,000 entries. Users look for swifts entering buildings or gathering for 'screaming parties'.
Installing swift bricks is another effective measure. These small structures provide permanent nest sites and can be fitted during building work. Bourne-Taylor's Feather Speech campaign advocates for mandatory swift bricks in new builds. Edward Mayer of Swift Conservation advises installing bricks during renovations when scaffolding is in place.
Swift boxes are also an option. They should be placed at least five metres high, away from windows and obstacles, with a concave nest cup. Multiple boxes encourage colony formation. If unable to install safely, TV aerial installers can help. Patience is needed, as other birds may use the boxes first.
