Wild House Martin Nest Conservation Urban

House martins are declining rapidly in the UK, with nest destruction during building renovation and reduced aerial insect prey among the primary welfare and conservation concerns.

Key Facts

UK house martin populations have declined by approximately 50% since the 1970s, with the species now amber-listed on the Birds of Conservation Concern list.
House martins build mud cup nests under the eaves of buildings, returning to the same sites year after year - nest destruction is a significant welfare harm.
Active house martin nests are legally protected in the UK under the Wildlife and Countryside Act 1981.
Artificial house martin nest cups, installed under eaves before the birds' arrival in April-May, have been shown to attract new colonies and supplement natural nest availability.
Aerial insect decline - driven by pesticide use, light pollution, and habitat loss - is reducing food availability for feeding chicks during the breeding season.

Welfare Considerations

House martin welfare during the breeding season is threatened by both nest destruction and food shortage. Chick starvation when aerial insects are insufficient causes prolonged suffering for both chicks and adults making repeated foraging trips. Nest destruction during renovation work destroys investment in both nest construction and current breeding attempts, potentially causing egg or chick mortality and the loss of a nest site to which adults have strong site fidelity. Legal protection of active nests provides a framework but requires awareness from building owners. Providing artificial nests in advance of natural nest installation - before renovation work is needed - creates durable alternatives that can be retained through building works.

What You Can Do

Install artificial house martin nest cups under eaves before the breeding season.
Check for active house martin nests before any building work between May and October.
Never use pesticides near house martin feeding areas - aerial insect prey is essential.
Participate in house martin surveys through the BTO to support population monitoring.