Horicon Marsh Wildlife Refuge, Horicon Wisconsin
The great blue heron (Ardea herodias) is a large wading bird in the heron family Ardeidae, common near the shores of open water and in wetlands over most of North America and Central America as well as the Caribbean and the Galápagos Islands. It is a rare vagrant to Europe, with records from Spain, the Azores,
England and the Netherlands. An all-white population found only in the
Caribbean and southern Florida was once treated as a separate species
and known as the great white heron.
It is the largest North American heron and, among all extant herons, it is surpassed only by the Goliath heron (Ardea goliath) and the white-bellied heron (Ardea insignis).
It has head-to-tail length of 91–137 cm (36–54 in), a wingspan of
167–201 cm (66–79 in), a height of 115–138 cm (45–54 in), and a weight
of 1.82–3.6 kg (4.0–7.9 lb). In British Columbia, adult males averaged 2.48 kg (5.5 lb) and adult females 2.11 kg (4.7 lb)
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