Common swifts nest in cavities in older buildings and face serious population declines as building renovation eliminates traditional nest sites. Swift boxes and building-integrated nest provisions can reverse this trend.
Individual swifts returning to nest sites that have been eliminated during building renovation face a reproductive welfare crisis, spending the entire breeding season unable to nest. Supporting swift nesting through installation of swift boxes, advocacy for swift bricks in building regulations, and preventing unnecessary disturbance of occupied nest sites directly protects individual bird welfare and breeding success.