Wood Warbler: Woodland Welfare Decline Science

Key Welfare Facts

Wood warblers declined by over 66% in the UK between 1995 and 2015, one of the steepest passerine declines.
They require open-structured deciduous woodland with sparse ground vegetation for ground nesting and foraging.
Shivering song display from males involves a distinctive accelerating trill that is energetically highly demanding.
Grazing and deer browsing that creates open woodland structure benefits wood warblers by reducing ground cover.
African wintering ground conditions in the humid forest zone are poorly understood but linked to population dynamics.
Breeding success monitoring using nest cameras has revealed high nest failure rates from predation in some areas.

Welfare Assessment

Wood warbler welfare and population recovery requires open-structured woodland management and investigation of African wintering ground threats. Supporting organisations managing woodland structure through controlled grazing and deer management advances this declining species.

What You Can Do

Support woodland management creating open-structured deciduous woodland with sparse ground cover
Donate to organisations monitoring wood warbler breeding success and investigating decline causes
Advocate for deer management in woodland that creates the open structure wood warblers require
Record wood warbler singing males for national woodland bird monitoring schemes in April-June