The overall distribution of this species can be assessed, and
specific locations where birds have been spotted can be found,
based on individual sighting reports submitted by birdwatchers to
ebird.org
.
The global distribution of the Green Heron is available
HERE
.
Green Herons are a partly migratory North American species.
There are disputes about the exact nature of different races of
the Green Heron, of which up to 5 are commonly listed. All
these races are found in northern to central America.
They are resident in (near-)coastal areas of tropical
central and northern America, from Panama in the South to
northern California on the American West coast (plus
parts of the southern Rocky Mountains)
and southern South Carolina on the American East coast.
They are also resident in the inland world of the Carribean.
In inland areas of central and southern North America, from
inland Honduras and Guatemala via inland Mexico to Texas,
New Mexico and Arizona, they are winter visitors.
During the northern summer they extend their breeding range
into the entire eastern half of the North American continent,
up to about the US/Canadian border, including New Foundland.
In the West of the continent they reach southern British
Columbia, Canada.
Vagrants sometimes cross the North Atlantic towards Europe.
In Europe, Green Herons, race "virescens"(?),
are only rarely seen as vagrants from North America.
Apart from a report from the Cote d'Azure in southern
France all sightings have been on the North Sea/Atlantic
coastline, from southern England and Wales to the Netherlands
and from the coastline of Portugal. There are more reports
of the species from the Azores.
Green Herons have a preference for small, well-vegetated
wetlands with good shelter in which to hide through most
of the day, being most active around dawn and dusk.