Willow Warbler / Telor y Helyg
Phylloscopus trochilus
Breeding 1984-89
Breeding 1968-72
Winter 1981/82-1983/84
Winter 2007/08-2010/11
Breeding 2008-11
Breeding 1984-89 vs 2008-11
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Contains Ordnance Survey data
© Crown copyright and database right 2013
Distribution map species lists
Breeding change maps
Species richness maps
© 2014 Glamorgan Bird Club
Breeding 1984-89
Status
Tetrads
Present
1
<1%
Possible
80
20%
Probable
78
19%
Confirmed
177
43%
Total
336
83%