Wildlife

Common Swift Welfare During Breeding Season

Common swifts spend almost their entire lives in the air, making breeding season their most vulnerable period — nest site loss in modern buildings is the primary welfare and population challenge.

Key Facts

Swifts spend up to 10 months per year airborne, even sleeping on the wing
UK swift populations have declined by over 60% since 1995
Modern building renovation blocks traditional swift nest sites in roof spaces
Artificial swift nest boxes have high adoption rates when correctly sited
Swifts return to the same nest site for up to 20 years

Welfare Considerations

Swift welfare during breeding is primarily threatened by nest site loss. Chicks in disrupted nests die of exposure and starvation. Adult swifts denied access to nest sites abandon breeding, causing population decline over time. Legislation requiring swift bricks in new buildings has been adopted in several UK local authorities. Nest box provision and building regulations are the most effective welfare interventions.

What You Can Do

Install swift nest boxes on east or north-facing walls above 5 metres
Advocate for swift brick requirements in local planning policy
Support RSPB and Swift Conservation swift mapping schemes
Alert your local council if swifts are present in buildings before renovation