Figure 29 Breeding distribution of the willow warbler
Woodland management for birds: Priority species
Long-distance migrant, wintering in sub-Saharan Africa
The Population Status of Birds in Wales:
Population trend and distribution
The most numerous and widespread summer visitor to Wales. The RWBS showed a decline of 49.0% (the RSPB) and
% (BTO) since the 1980s (Amar et al.
. The BBS shows a significant Welsh
decline of 20% between 1994 and 2007.
General: open scrubby woodland, woodland edge, clearings, rides and glades, young conifer plantations, damp areas with alder and willow, gardens, hedges and bushy areas of open moorland and ffridd. This is a species of early successional and transitional woodland habitats, and is particularly associated with birch.
Adult survival during migration and in the winter grounds may be important (Fuller 2005).
Deterioration of habitat quality within woodland due to changes in management, eg increase in grazing may be a factor as this can result in the loss of nesting and foraging opportunities (Fuller 2005).
Nesting: located on the ground, well concealed in low vegetation at the base of low shrubs or grass tussocks.
Promote open, scrubby woodland edges and edges to rides and glades.
Manage to allow areas of early successional and transitional woodland habitats.
Create and/or maintain wet features.
Feeding: Invertebrates including mayflies, damselflies, adult and larval butterflies, bees and wasps, also spiders in the breeding season, fruits and seeds in the autumn.
26 Preliminary assessment for 2008 revision of The Population Status of Birds in Wales: Amber-listed.