Albania (NB), Armenia (B), Austria (NB), Azerbaijan (NB), Bahamas, Belarus (B) (NB) (P), Belgium (NB), Bermuda, Bosnia and Herzegovina, Bulgaria (NB), Canada (B) (P), China (mainland), Croatia (Local Name: Hrvatska) (NB), Cuba, Cyprus (NB), Czech Republic (NB), Denmark (B) (NB) (P), Egypt, Estonia (B) (NB) (P), Faroe Islands (B) (NB), Finland (B) (NB) (P), France (B) (NB) (P), Germany (B) (NB) (P), Greece (B) (NB), Greenland (B) (NB), Hungary (NB), Iceland (B) (NB), Iran [Islamic Republic of] (NB), Iraq, Ireland (B) (NB), Israel, Italy (NB), Japan, Kazakhstan (B), Kyrgyzstan (B) (NB), Latvia (B) (NB), Libyan Arab Jamahiriya, Liechtenstein, Lithuania (B) (NB) (P), Macedonia [The Former Yugoslav Republic of] (B) (NB), Malta, Mexico, Moldova [Republic of] (NB), Montenegro (NB), Morocco, Netherlands (B) (NB), North Korea, Norway (B) (NB) (P), Pakistan, Poland (B) (NB) (P), Portugal (NB), Romania (NB) (P), Russia (Asian) (B), Russia (Central Asian) (B) (P), Russia (European) (B) (P), Serbia (NB), Slovakia (Slovak Republic) (NB), Slovenia (NB), South Korea, Spain (NB), St Pierre and Miquelon (B) (NB), Sweden (B) (NB) (P), Switzerland (B) (NB), Taiwan (China), Tunisia, Turkey (NB), Turkmenistan, Turks and Caicos Islands, Ukraine (B) (NB) (P), United Kingdom (B) (NB), USA (B), Uzbekistan.
Vagrant to Afghanistan, Algeria, Bahrain, Belize, Cayman Islands, Gibraltar, Haiti, India, Jordan, Kuwait, Lebanon, Luxembourg, Mongolia, Nepal, Northern Mariana Islands, Oman, Puerto Rico, Svalbard and Jan Mayen Islands, Syrian Arab Republic, United Arab Emirates, Virgin Islands (U.S.).
Most of northern North America, south to Great Lakes; Greenland, Iceland and most of northern Eurasia, south to Britain, north-eastern China and northern Japan.
 
Population
Estimated population is 510,000 - 610,000 (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