
Photo: Stefan C · CC0 1.0
Leptoptilos javanicus
Range
May occur as a vagrant on the southern edge of Bhutan
Incubation period
28–30 days
Size
87–93cm long; stands 110–120cm
Weight
4–5.71kg
The lesser adjutant is a large stork with an upright stance and a bare head and neck without a hanging pouch. It is 87 to 93cm long, stands about 110 to 120cm tall and weighs 4 to 5.71kg. The upper shank is grey rather than pink, and the tarsus measures 22.5 to 26.8cm. Incubation lasts 28 to 30 days (Wikipedia, general species account).
The account opened says it may occur as a vagrant on the southern edge of Bhutan, so it should not be expected as a regular bird there. It gives no habitat, diet or nesting detail, so none is stated.