World Bird List

Species factsheet
Great Blue Heron (Ardea herodias)

Order: Ardea herodias
Family: Herons, Bitterns (Ardeidae)

Danske navn: Stor Blåhejre

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
fannini nw North America
wardi w, sc, s USA to n Florida and w, ne Mexico.
herodias s Canada to nc, e USA south to the n Carolinas.
occidentalis s Florida (USA) through the West Indies
cognata Galápagos Is.