Austria (NB), Belarus (NB), Belgium (NB), Bulgaria (NB), Canada (B) (NB) (P), Czech Republic (NB), Denmark (B) (NB) (P), Estonia (B) (NB) (P), Faroe Islands (B) (NB), Finland (B) (NB) (P), France (B) (NB) (P), Germany (B) (NB) (P), Greenland (B) (NB), Iceland (B) (NB), Ireland (B) (NB), Italy (B) (NB), Latvia (NB), Liechtenstein, Lithuania (NB), Macedonia [The Former Yugoslav Republic of] (NB), Netherlands Antilles (B) (NB), Norway (B) (NB) (P), Poland (B) (NB), Romania (NB), Russia (Asian) (B) (NB), Russia (European) (B) (NB), Slovakia (Slovak Republic) (NB), Slovenia (NB), Spain (NB), St Pierre and Miquelon (NB) (P), Svalbard and Jan Mayen Islands (B), Sweden (B) (NB) (P), Switzerland (B) (NB), Ukraine (B) (NB) (P), United Kingdom (B) (NB), USA (B).
Vagrant to Bosnia and Herzegovina, Croatia (Local Name: Hrvatska), Georgia, Greece (NB), Hungary (NB), Israel, Japan, Luxembourg, Montenegro (NB), Portugal, Russia (Central Asian), Serbia (NB), Turkey (NB).
Population
Estimated population is 3,100,000 - 3,800,000 (2010).
The Reader's Digest Book of British Birds 1980, 3rd Edition, Drive Publications Ltd ISBN 0 340 25308 8
Birds in Colour Campbell, B., 1960, Penguin Books Ltd
The Pocket Guide to Nest and Eggs Fitter, R.S.R., 1954, Collins
RSPB Handbook of British Birds Holden, P., Cleeves, T., 2002, A & C Black ISBN 0 7136 5713 8
Birds of Britain and Europe Sterry, P., et al., 2001, AA Publishing ISBN 0 7495 3068 5
The Popular Handbook of British Birds Hollom, P.A.D., 1973, H.F. & G. Witherby Ltd ISBN 0 85493 002 7