Wild Marsh Tit and Willow Tit Decline

Marsh tit and willow tit are among the most rapidly declining woodland birds in the UK. Both species have experienced severe population losses since the 1970s from habitat changes that are not fully understood.

Key Facts

Willow tit populations declined by 94% between 1967 and 2012 - one of the steepest declines of any UK breeding bird
Marsh tit populations declined by approximately 70% over the same period
Both species are year-round residents that do not migrate, making them sensitive to local habitat quality
Willow tits excavate their own nest cavities in soft, rotten wood - a declining microhabitat
Marsh tits use natural cavities but require extensive areas of dense woodland with a shrub layer
Research suggests that reduction of coppice management and loss of woodland structure diversity is a key driver
Both species are amber-listed Birds of Conservation Concern in the UK
Targeted management including coppice restoration and nest box provision has shown some local success

Welfare Considerations

The severe decline of both marsh tit and willow tit represents a sustained welfare and conservation failure driven by changing woodland management over decades. Individual birds in fragmented, structurally simple woodland face reduced food availability and nesting opportunities that directly affect survival and breeding success. The complexity of the decline drivers makes intervention challenging, but targeted coppice management and nest box provision show that restoration is possible. Conservation action for these species benefits the broader woodland community of plants, invertebrates, and birds.

What You Can Do

Support woodland conservation charities that manage coppice woodland for biodiversity
Report marsh tit and willow tit sightings to local bird recording groups and the BTO Atlas
Install nest boxes with 25-28mm holes in woodland gardens to support marsh tits
Advocate for woodland management grants that incentivise coppice restoration and structural diversity