Wildlife of Borneo

Lesser adjutant

Leptoptilos javanicus

The lesser adjutant is a long-legged wading bird in the stork family. Documented Central Kalimantan records come from Sebangau NLPSF; Sungai Paduran Alam, Sebangau National Park.

Near threatened
Species details & taxonomy
Species
Leptoptilos javanicus
Genus
Leptoptilos
Family
Ciconiidae
Order
Ciconiiformes
Class
Aves
Lesser adjutant (Leptoptilos javanicus).
Lesser adjutant (Leptoptilos javanicus).Mike Prince from Bangalore, India · Wikimedia Commons · CC BY 2.0 · Original

Recognition

The lesser adjutant is a long-legged wading bird in the stork family.

Sources & references · 2www.tnsebangau.com · Sebangau National Park, Sungai Paduran Alam (2015)www.nature.com · Lesser adjutant: natural history

Daily life

Sebangau's official records include it at Sungai Paduran Alam. Its range extends across South and Southeast Asia. A 2025 study notes that the 2023 IUCN assessment changed its global category from Vulnerable to Near Threatened.

Sources & references · 2www.tnsebangau.com · Sebangau National Park, Sungai Paduran Alam (2015)www.nature.com · Lesser adjutant: natural history

Range and local records

Published research has documented this species at Sebangau NLPSF; Sungai Paduran Alam, Sebangau National Park. These observations provide a historical picture of its Bornean forest range.

Sources & references · 2Mires and Peat · Husson et al. (2018), Biodiversity of the Sebangau tropical peat swamp forest, Indonesian Borneowww.tnsebangau.com · Sebangau National Park, Sungai Paduran Alam (2015)

Forest and water

The linked habitat is the documented Sebangau peat-swamp landscape. Observation dates and locality remain attached to the evidence, so a park-wide abundance or sighting probability is not inferred.

Sources & references · 2Mires and Peat · Husson et al. (2018), Biodiversity of the Sebangau tropical peat swamp forest, Indonesian Borneowww.tnsebangau.com · Sebangau National Park, Sungai Paduran Alam (2015)

A wetland and its nesting forest

RASI surveys established Metau forest in West Kutai as a breeding locality beside the feeding wetlands of Jempang Lake. The report describes nesting in Shorea balangeran and documents nestling capture. This historical evidence connects protection of nesting trees with adjoining floodplain habitat; it does not establish today's colony size.

Sources & references · 1Yayasan Konservasi RASI / Budiono and Kreb · Protecting the breeding habitat of the lesser adjutant in tropical lowland Metau forest, West Kutai District, East Kalimantan

Quiet at the water's edge

The massive bill, bare head and absence of a throat pouch distinguish it from the greater adjutant. Sarawak's account describes wet fields, flooded grassland, mud banks and mangroves. Birds may soar alone or in small groups. Their usual silence contrasts with bill clapping and buzzing at nests.

Sources & references · 1Forest Department Sarawak · Lesser Adjutant Stork

Where to look

A recorded occurrence does not guarantee a sighting or visitor access. Read the area and experience guides for habitat, responsible observation, guiding and current access before choosing a trip. Keep wildlife at a distance and follow local restrictions.

Places with documented occurrence

Sources & references

Yayasan Konservasi RASI / Budiono and Kreb · Protecting the breeding habitat of the lesser adjutant in tropical lowland Metau forest, West Kutai District, East KalimantanAccessed: 2026-10-04

Forest Department Sarawak · Lesser Adjutant StorkAccessed: 2026-10-04

Mires and Peat · Husson et al. (2018), Biodiversity of the Sebangau tropical peat swamp forest, Indonesian BorneoAccessed: 2026-10-01

www.tnsebangau.com · Sebangau National Park, Sungai Paduran Alam (2015)Accessed: 2026-10-01

www.nature.com · Lesser adjutant: natural historyAccessed: 2026-10-01

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