One of Southeast Asia’s most threatened birds, a large, dark ibis recognizable by — as its name suggests — the pale white patches on its shoulders that flash in flight. It has a long, down-curved bill, bare reddish skin around the face, and deep slate-black plumage with a subtle metallic sheen. When the light hits just right, the contrast of its pale shoulders, bright facial skin, and glossy feathers gives it a striking, almost regal look. It once ranged widely across mainland Southeast Asia, but today it survives in only a few scattered strongholds in Cambodia, Laos, and possibly parts of Vietnam, making it one of the rarest wading birds on Earth.
This ibis favors dry forest landscapes, unlike most ibis species that prefer wetlands. It depends on a unique mix of open forest, sandbars, grasslands, and small waterholes that appear during the dry season. These waterholes — called trapaengs in Cambodia — are essential for feeding. The white-shouldered ibis probes in the mud for frogs, small fish, insects, snails, and even crabs. It also feeds in shallow rivers and grazes on grasslands, showing remarkable flexibility compared to other ibises. The species tends to forage alone or in small groups, and it is notably quiet and wary, often slipping away before observers can get close.
The white-shouldered ibis is classified as Critically Endangered, with only around 1,000 individuals estimated to remain. The species’ decline is driven by deforestation, loss of seasonal wetlands, hunting, and disturbance at nesting sites. In some regions, livestock compete with ibises by trampling or muddying the shallow pools they rely on for foraging. However, Cambodia has become the species’ final stronghold, with conservation groups working closely with local communities to protect trapaengs, regulate fire use, and create incentives to safeguard nesting trees. These efforts have led to some encouraging population gains in protected areas.
Distribution
Cambodia
China
Indonesia
Laos
Malaysia
Myanmar
Thailand
Official estimate
Vietnam
Official estimate
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Terrestrial / Aquatic
Altricial / Precocial
Polygamous / Monogamous
Dimorphic (size) / Monomorphic
Active: Diurnal / Nocturnal
Social behavior: Solitary / Pack / Herd
Diet: Carnivore / Herbivore / Omnivore / Piscivorous / Insectivore
Migratory: Yes / No
Domesticated: Yes / No
Dangerous: Yes / No
