Great-billed Heron
Ardea sumatrana
大嘴鹭
Introduction
The great-billed heron is among the larger heron species, with a body length of approximately 115 cm. It occurs in tropical waters across the Indo-Pacific region, including Southeast Asia and Australasia. It inhabits coastal environments such as mangroves, coral reefs, and large river mouths, where it hunts in shallow waters. The species has dark plumage and typically stands motionless at the water's edge or glides slowly overhead with its neck retracted. Its flight is slow and deliberate, distinguishing it from storks and cranes, which fly with extended necks.
Description
A large, robust heron standing approximately 115 cm tall and weighing up to 2.6 kg. The plumage is predominantly dark grey on the upperparts, giving the bird a uniformly somber appearance. In flight, the wings appear uniformly dark grey without the contrasting patterns seen in some other heron species. The species possesses a long, sharp bill adapted for spearing fish. The flight is notably slow and methodical, with the neck held in the characteristic heron S-curve rather than extended forward. Overall build is heavier and bulkier than the similar-looking purple heron.
Identification
The most reliable distinguishing feature from the purple heron is its larger size and darker overall coloration. In flight, the uniformly dark grey upperwings separate it from several similar species. The slow, retracted-neck flight pattern immediately distinguishes it from storks, cranes, and spoonbills, all of which fly with extended necks. The combination of dark grey plumage, large size, and coastal habitat preference helps separate it from the more widespread grey heron.
Distribution & Habitat
The species occurs along coastal regions from Southeast Asia through Indonesia and the Philippines to Papua New Guinea and northern Australia. It is considered native to Queensland, Australia. Two subspecies are recognized: A. s. mathewsae on the tropical northern Australian coast, and A. s. sumatrana on the coasts of southeastern Asia, Indonesia, Philippines, and New Guinea. Its habitat is predominantly coastal, including islands, coral reefs, mangroves, and large rivers, though it occasionally ventures inland to shallow ponds.
Behavior & Ecology
The species feeds primarily in shallow waters, using two main hunting strategies: remaining motionless to ambush passing prey, or slowly stalking victims through the water. Its primary diet consists of fish, which it spears with its long, sharp bill. No detailed information is provided in the source regarding breeding behavior, social structure, or vocalizations, though like most herons it is likely to be territorial during the breeding season.
Source: Wikipedia · CC BY-SA 3.0
Taxonomy
- Order
- Pelecaniformes
- Family
- Ardeidae
- Genus
- Ardea
- eBird Code
- grbher2
Distribution
coasts and satellite islets, and sometimes inland waterways, from southern Myanmar through Indonesia and the Palawan and Sulu Archipelago to New Guinea and northern Australia (Kimberley region, northern Western Australia, eastward to northeastern Queensland)
Data Sources
Species description from Wikipedia, licensed under CC BY-SA 3.0.
Taxonomy data from AviList 2025.