Swift Conservation and Urban Nesting

Common swifts are in serious decline partly due to loss of nesting sites in buildings, and targeted conservation in urban areas can significantly support population recovery.

Key Facts

UK swift population has declined by 60% since the 1990s
Swifts spend almost their entire lives on the wing, landing only to nest
They nest in cavities in older buildings that are blocked during renovation
Modern buildings provide almost no swift nesting opportunities
Swift brick inserts can provide permanent nesting sites in new and refurbished buildings

Welfare Considerations

Swift welfare is linked directly to nest site availability: pairs that cannot find or return to nest sites fail to breed, reducing population reproductive success. The welfare harm is ecological — individuals experience reduced reproductive fitness and the anxiety of failed nesting attempts. Urban swift colonies that successfully establish produce birds that return for decades, creating stable welfare-positive breeding populations. Building regulations that require swift bricks in new construction represent a systemic welfare intervention with lasting effect.

What You Can Do

Install swift nest boxes or bricks on suitable buildings
Advocate for mandatory swift brick requirements in planning regulations
Never block swift nesting holes without providing alternative nest sites
Support RSPB and Swift Conservation swift colony surveys
Listen for swift screaming parties in July as an indicator of local colonies