Managing swift colonies in and around buildings requires understanding the species' specific needs, legal protections, and the practical challenges of coexisting with nesting birds in built structures. Good colony management balances swift welfare with property owner needs and long-term conservation goals.
All swift nests are protected under Schedule 1 of the Wildlife and Countryside Act 1981. It is illegal to intentionally disturb swifts at or near an active nest, or to block, seal, or otherwise prevent access to an active nest site. During the nesting season (May-August), any work to buildings with swift nests requires an EPS (European Protected Species) licence and usually mitigation in the form of artificial nest provision.
Before any building work commences, a swift survey should be conducted during the nesting season. Swifts are best detected at their nest sites in the evening (between one hour before dusk and dusk) when birds are entering and exiting nest apertures. Nest sites show characteristic features: worn, stained entry holes; pairs screaming and entering in swift "screaming parties". Survey results must be documented and inform planning applications and mitigation design.
When building works unavoidably affect swift nest sites, artificial nests must be provided as mitigation. Options include:
Mitigation should be installed before works begin, in the same location and at the same height where possible, and should include sound lures to attract returning birds.
Tracking colony productivity through nest camera monitoring (installed in nest boxes) provides valuable data on breeding success, occupancy rates, and chick provisioning. Nest cameras have transformed public engagement with swift conservation and provide data on colony health and management effectiveness. Data should be submitted to local swift groups and the RSPB to contribute to national monitoring.