# Asian openbill (*Anastomus oscitans*)

Canonical page: https://creaturedata.com/animals/asian-openbill  
Data as of: 2026-11-11

The Asian openbill (Anastomus oscitans), also called the Asian openbill stork, is a bird of the family Ciconiidae in the order Ciconiiformes. The Asian openbill is a carnivore and an aquatic predator, and it is partially migratory, with a geographic range of 2,120,000 km². It is listed as Least Concern on the IUCN Red List, which is not a threatened category, and its lifespan is given as 18 years.

## Quick facts

| Fact | Value |
|---|---|
| Weight | 1.59 kg |
| Length | Not recorded |
| Lifespan | 18 years |
| Diet | Aquatic predator |
| Main food | Not recorded |
| Habitat | wetland |
| Young per litter or clutch | 3 – 3.2 |
| Lifestyle | Terrestrial |
| Migration | Partial |
| Conservation status | Least Concern (IUCN) |
| Countries on record | Not recorded |

## Classification

- kingdom: Animalia
- phylum: Chordata
- class: Aves
- order: Ciconiiformes
- family: Ciconiidae
- genus: Anastomus
- species: *Anastomus oscitans* (Boddaert, 1783)

Synonyms: *Ardea oscitans*

## Common questions

### What kind of animal is the Asian openbill?

The Asian openbill is a bird of the family Ciconiidae, in the order Ciconiiformes and genus Anastomus.

### How heavy is the Asian openbill?

The Asian openbill has an adult body mass of 1.59 kg, which places it in the medium size class.

### What does the Asian openbill eat?

The Asian openbill is a carnivore classed as an aquatic predator.

### Is the Asian openbill endangered?

No. The Asian openbill is listed as Least Concern on the IUCN Red List, which is not a threatened category.

### How long does the Asian openbill live?

The lifespan of the Asian openbill is given as 18 years.

### How many eggs does the Asian openbill lay?

The Asian openbill has 3 eggs per clutch.

### Who named the Asian openbill?

The Asian openbill, Anastomus oscitans, was named by (Boddaert, 1783).

## Sources

- [An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles](https://doi.org/10.6084/m9.figshare.3563457.v1), CC0 1.0, E096-269. Myhrvold, N.P., Baldridge, E., Chan, B., Sivam, D., Freeman, D.L. & Ernest, S.K.M. (2015) An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96: 3109. https://doi.org/10.1890/15-0846R.1. Data: https://doi.org/10.6084/m9.figshare.3563457.v1
- [AVONET: morphological, ecological and geographical data for all birds](https://doi.org/10.6084/m9.figshare.16586228.v7), CC BY 4.0, v7. Tobias, J.A. et al. (2022) AVONET: morphological, ecological and geographical data for all birds. Ecology Letters 25: 581–597. https://doi.org/10.1111/ele.13898. Data: https://doi.org/10.6084/m9.figshare.16586228.v7
- [Catalogue of Life eXtended Release](https://www.checklistbank.org/dataset/316691), CC BY 4.0, 2026-10-16 XR. Catalogue of Life (2026). Catalogue of Life eXtended Release, version 2026-10-16 XR. Catalogue of Life Foundation, Amsterdam, Netherlands. https://doi.org/10.48580/dgzlf
- [Wikimedia Commons](https://commons.wikimedia.org), per file (CC0 / public domain / CC BY green, CC BY-SA amber, anything else not displayed), 2026-11-11. Wikimedia Commons contributors. Wikimedia Commons. https://commons.wikimedia.org (each file credited to its author under its own licence).
- [Wikidata](https://www.wikidata.org), CC0 1.0, 2026-11-11. Wikidata contributors. Wikidata. https://www.wikidata.org (data retrieved via the Wikidata Query Service).
- [Wikipedia (English)](https://en.wikipedia.org), CC BY-SA 4.0, 2026-11-11. Wikipedia contributors. Wikipedia, The Free Encyclopedia. https://en.wikipedia.org (text under CC BY-SA 4.0; each block names its article and revision).

Cite as: Asian openbill (Anastomus oscitans). Retrieved from https://creaturedata.com/animals/asian-openbill