Asian Openbill vs Oriental Stork
Anastomus oscitans compared with Ciconia boyciana
Side-by-Side Comparison
| Attribute | Asian Openbill | Oriental Stork |
|---|---|---|
| Scientific Name | Anastomus oscitans | Ciconia boyciana |
| Order | Ciconiiformes | Ciconiiformes |
| Family | Ciconiidae | Ciconiidae |
| Conservation Status | Least Concern | Endangered |
| Length | — | 115.0 cm (45.3 in) |
| Wingspan | 79.4 cm (31.3 in) | 220.0 cm (86.6 in) |
| Weight | 1590.0 g (56.09 oz) | 5000.0 g (176.37 oz) |
| Diet | -- | Fish, frogs, snakes, large insects, and small mammals caught in shallow wetlands. Feeds by wading … |
| Clutch Size | 2-5 | 2-6 |
| Population Trend | — | — |
Size Comparison
Habitat Comparison
Oriental Stork
Wetlands, flooded rice paddies, rivers, and marshes. Nests on tall trees, utility poles, and artificial platforms.
Song & Call Comparison
Asian Openbill
Oriental Stork
Essentially silent like all storks; produces loud mechanical bill-clattering at the nest as a greeting display. Chicks beg with hissing and squeaking. Rarely vocalizes otherwise.
Geographic Range & Migration
Asian Openbill
Oriental Stork
Breeds in the Russian Far East and northeastern China. Winters in southeastern China, Japan, and Korea.
Conservation Status
Asian Openbill
Oriental Stork
How to Tell Them Apart
Asian Openbill
Oriental Stork
White body plumage with black flight feathers. Red bare skin around the eye and black bill distinguish it from the white stork. Pinkish-red legs.
Long, thick, straight, black bill
About These Birds
Asian Openbill
68–81 cm. White plumage with black flight feathers; same gaping bill as African Openbill. Resident across South and Southeast Asia in wetlands, paddy fields, and river floodplains. Feeds primarily on apple snails; colonial nester in trees. Often seen in large flocks near agricultural land.
Oriental Stork
The oriental stork is one of the most endangered stork species, with fewer than 3,000 individuals remaining in the wild. It was once widespread across East Asia but declined dramatically due to wetland drainage and pesticide use. Reintroduction programs in Japan and Korea have achieved notable success.