Long-distance migrant, wintering in sub-Saharan Africa
The Population Status of Birds in Wales:
Population trend and distribution
A widely distributed summer visitor in Wales (Lovegrove et al.). The RWBS showed declines of 42.5% (the RSPB) and 41.8% (BTO) in Wales since the 1980s (Amar et al. 2006), and the BBS shows a decline of 25% in Wales between 1994 and 2007.
General: open deciduous woodland with a well-developed shrub layer, woodland edge, rides and glades, coppice and young conifer plantations.
Nesting: in a low tree or bush, eg bramble or in tall herbs, eg nettles and willowherb.
invertebrate availability in deciduous woodland (Fuller et al. 2005; Hüppop and Winkel 2006). Structural changes at the woodland edge, eg due to changes in grazing pressure could limit opportunities for nesting. A substantial increase in nest losses at the chick stage and post-fledging survival (BTO 2008). Climate change impacts on their wintering grounds may be a factor (BTO 2008).
Feeding: chiefly insects in the breeding season eg springtails, mayflies, damselflies, dragonflies and butterfly and beetle larvae.
It is possible that the timing of migration
is becoming out of phase with peak
Promote open-structured woodland with a well-developed shrub layer, scrubby woodland edges, and rides and glades, eg by controlling grazing or introducing coppice management.
24 Preliminary assessment for 2008 revision of The Population Status of Birds in Wales: Amber-listed.
Figure 27 Breeding distribution of the garden warbler in Wales.