Anguilla (B), Antigua and Barbuda, Aruba, Bahamas, Barbados, Belize, Bermuda (B), Canada (B) (P), Cayman Islands, Chile, Colombia, Costa Rica, Cuba, Dominica, Dominican Republic, Ecuador, El Salvador, French Guiana, Grenada (B), Guadeloupe (B), Guatemala, Haiti, Honduras, Jamaica (B), Martinique (B), Mexico, Netherlands Antilles, Nicaragua, Panama, Peru, Puerto Rico, St Pierre and Miquelon (B) (NB) (P), Trinidad and Tobago, Turks and Caicos Islands, USA (B), Venezuela, Virgin Islands (British) (B) (NB), Virgin Islands (U.S.) (B) (NB).
Vagrant to Brazil, Faroe Islands, France, Greenland, Guyana, Hungary, Iceland, Ireland, Norway, Portugal, Spain, St Kitts and Nevis, St Lucia, St Vincent and The Grenadines (B), Sweden, Switzerland, United Kingdom.
Population
Estimated population is 1,000,000 (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
BirdLife International Species Factsheet