Great Blue Heron (Ardea herodias) lives in freshwater wetlands across Coastal Spain, the Azores, and areas of far southern Europe. Its conservation status is Least Concern.
Hear the Great Blue Heron
A real field recording of the Great Blue Heron, made in the wild.
Great blue herons can weigh up to 3.6 kg (7.9 lb), making them roughly twice as heavy as great egrets while only a little taller. In British Columbia adult males averaged 2.48 kg (5.5 lb) and adult females 2.11 kg (4.7 lb); in Nova Scotia and New England both sexes averaged 2.23 kg (4.9 lb), and in Oregon 2.09 kg (4.6 lb).
Great blue heron colonies, called heronries, can hold between five and 500 nests, averaging about 160 nests per site, and are usually within 4-5 km (2.5-3.1 mi) of rich feeding grounds. Nests start around 50 cm (20 in) across but can grow to over 120 cm (47 in) wide and 90 cm (35 in) deep with repeated use. This dense nesting strategy reduces individual predation risk because many eyes and ears watch for eagles, raccoons and crows, illustrating how social spacing boosts survival.
Adult great blue herons face few natural predators, but bald eagles (Haliaeetus leucocephalus) will attack them at any life stage, from egg to adult. Golden eagles, great horned owls, bobcats, and even Harris's hawks have been recorded killing herons. When a predator strikes a colony, the disturbance can cause the entire rookery to abandon the site, showing how a single predation event can ripple through the population.
Great blue herons are found from Alaska to the Caribbean, nesting up to 1,500 m (4,921 ft) elevation and tolerating both fresh and saltwater wetlands. Their range expands south in winter, with northern birds migrating to the southern U.S., Central America or northern South America, while many southern populations stay year-round.
A single great blue heron can swallow fish up to 60 cm (24 in) long and 900 g (2.0 lb) heavy, though it usually prefers 10-20 cm (3.9-7.9 in) fish. Their long, sharp bill spears prey in water less than 50 cm (20 in) deep.
Sources
Every fact above was checked against these pages, and kept only where one of them states it.
RangeCoastal Spain, the Azores, and areas of far southern Europe
HabitatFreshwater wetlands
DietFish and frogs
About the Great Blue Heron
As the Great Blue Heron wades silently through the mist-shrouded wetlands, its slender legs barely ripple the water's surface, a testament to its patience and stealth. With each deliberate step, it weaves a slow and mesmerizing dance, its piercing gaze scanning the depths for the slightest hint of movement, its majestic wings folded against its back like a dark, feathered cloak. In this serene and timeless world, the Great Blue Heron reigns as a master of stillness, its very presence a reminder of the beauty and tranquility that can be found in the unlikeliest of places.
Advertisement
Hear the Great Blue Heron, and 4,400+ more
Real recorded sounds, 11 nature games and a free Daily 5, 1v1 quiz duels, conservation wins and a safe Kids mode. Free on Feravox.
