Anguilla, Antigua and Barbuda, Argentina, Aruba, Bahamas, Barbados, Belize, Bermuda (B), Bolivia, Brazil, Canada (B), Cayman Islands, Chile, Colombia, Costa Rica, Cuba, Dominica, Dominican Republic, Ecuador, El Salvador, French Guiana, Grenada (B), Guadeloupe, Guatemala, Guyana, Haiti, Honduras, Jamaica (B), Martinique, Mexico, Montserrat, Netherlands Antilles, Nicaragua, Panama, Paraguay, Peru, Puerto Rico (B), St Kitts and Nevis, St Lucia, St Vincent and The Grenadines, Suriname, Trinidad and Tobago, Turks and Caicos Islands, Uruguay (B), USA (B), Venezuela, Virgin Islands (British) (NB), Virgin Islands (U.S.) (NB).
Vagrant to American Samoa, Falkland Islands (Malvinas), Iceland, Portugal, South Africa, South Georgia and the South Sandwich Islands, St Helena, St Pierre and Miquelon (P), United Kingdom.
Population
Estimated population is 390,000 - 1,400,000 (2010).
Snowy Egret (Egretta thula) [XC511511]
by Ricardo Jos\u00e9 Mitidieri from Riparian Preserve at Water Ranch (near Gilbert), Maricopa County, Arizona, United States (call)
Snowy Egret (Egretta thula) [XC705547]
by Jerome Fischer from Ochopee, Collier County, Florida, United States (call)
Subspecies
Forms superspecies with Little Egret (Egretta garzetta).
The following 2 subspecies are recognised:
thula (Molina, 1782) - North, Central and South America, from north-eastern USA through Caribbean to north-eastern Argentina, and from north-western Mexico to southern Chile.
brewsteri Thayer & Bangs, 1909 - Western USA, Baja California.