Asian Openbill Stork

Asian Openbill Stork

Anastomus oscitans

Silhouette: PhyloPic · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Daily sighting probability ~60% · Likely
at Yala National Park
919 Verified sightings at Yala National Park From 2019 to 2026
7,654 Verified sightings across all 29 parks From 2019 to 2026
May Best month highest sighting rate
🌅 Crepuscular When it's spotted at dawn and dusk

About the Asian Openbill Stork

The Asian openbill or Asian openbill stork (Anastomus oscitans) is a large wading bird in the stork family Ciconiidae. This distinctive stork is found mainly in the Indian subcontinent and Southeast Asia. It is greyish or white with glossy black wings and tail. Adults have a gap between the arched upper mandible and recurved lower mandible which is thought to be an adaptation that aids in the handling of snails, their main prey. Young birds are born without this gap. Although resident within their range, they make long distance movements in response to weather and food availability.

The Asian openbill was described by the French polymath Georges-Louis Leclerc, Comte de Buffon in 1780 in his Histoire Naturelle des Oiseaux from a specimen collected in Pondichery, India. The bird was also illustrated in a hand-coloured plate engraved by François-Nicolas Martinet in the Planches Enluminées D'Histoire Naturelle which was produced under the supervision of Edme-Louis Daubenton to accompany Buffon's text. Neither the plate caption nor Buffon's description included a scientific name but in 1783 the Dutch naturalist Pieter Boddaert coined the binomial name Ardea oscitans in... Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Kaziranga National Park 🇮🇳 India
~60%
2 Yala National Park 🇱🇰 Sri Lanka
~60%
3 Chitwan National Park 🇳🇵 Nepal
~50%
4 Bandipur National Park 🇮🇳 India
~40%
5 Minneriya National Park 🇱🇰 Sri Lanka
~40%
6 Wilpattu National Park 🇱🇰 Sri Lanka
~30%
7 Keoladeo National Park 🇮🇳 India
~30%
8 Ranthambore National Park 🇮🇳 India
~20%
9 Satpura National Park 🇮🇳 India
~20%
10 Manas National Park 🇮🇳 India
~20%
11 Royal Bardia National Park 🇳🇵 Nepal
~20%
12 Nagarhole National Park 🇮🇳 India
~20%
13 Sundarbans National Park 🇮🇳 India
~10%
14 Khao Yai National Park 🇹🇭 Thailand
~10%
15 Kaeng Krachan National Park 🇹🇭 Thailand
~10%
16 Periyar National Park 🇮🇳 India
<5%
17 Mudumalai National Park 🇮🇳 India
<5%
18 Kanha National Park 🇮🇳 India
<5%
19 Bandhavgarh National Park 🇮🇳 India
<5%
20 Royal Manas National Park 🇧🇹 Bhutan
<5%
21 Sinharaja Forest Reserve 🇱🇰 Sri Lanka
<5%
22 Doi Inthanon National Park 🇹🇭 Thailand
<5%
23 Jim Corbett National Park 🇮🇳 India
<5%
24 Gir National Park 🇮🇳 India
Insufficient data
25 Taman Negara National Park 🇲🇾 Malaysia
Insufficient data
26 Cat Tien National Park 🇻🇳 Vietnam
Insufficient data
27 Cuc Phuong National Park 🇻🇳 Vietnam
Insufficient data
28 Khao Luang National Park 🇹🇭 Thailand
Insufficient data
29 Khao Sok National Park 🇹🇭 Thailand
Insufficient data

Quick answers

What are the chances of seeing a Asian Openbill Stork in Yala National Park?

About 60% of wildlife watchers report a Asian Openbill Stork sighting in Yala National Park, based on 919 verified sightings from GBIF citizen-science data.

When is the best time to see Asian Openbill Stork in Yala National Park?

May has the highest sighting rate for Asian Openbill Stork in Yala National Park in our monthly data.

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