Wild Birds

Jackdaw Welfare and Urban Nesting Conflicts

The jackdaw is a small, grey-capped corvid that nests colonially in chimneys, old trees, and building crevices, creating conflicts with property owners that raise welfare questions about nest removal and habitat loss.

Key Facts

Jackdaws nest in chimneys, causing fire hazards that lead to legal nest removal in some circumstances
UK populations are broadly stable at around 1.4 million pairs
They form large winter roosts with rooks and other corvids, sometimes tens of thousands strong
Jackdaws mate for life and maintain long-term social bonds within colony groups
They are important ecological agents, dispersing seeds and controlling invertebrate populations in farmland

Welfare Considerations

Jackdaw welfare is affected by legal nest removal from chimneys, which is permitted under general licence for safety reasons. Nest removal during the active breeding season abandons eggs and chicks. The installation of chimney cowls eliminates this conflict humanely when done before the breeding season. Lead poisoning from ingested soil and dust in areas with historic lead contamination is an emerging welfare concern for urban jackdaw populations.

What You Can Do

Install chimney cowls before the breeding season begins in March to prevent nesting conflicts
Never remove active jackdaw nests containing eggs or chicks during the breeding season
Contribute jackdaw nesting records to BTO surveys to monitor colonial breeding populations
Support tree hole and box provision programs that provide alternative nest sites
Advocate for reduction of urban lead contamination that affects corvid and other wildlife health