Rhyticeros undulatus
Silhouette: Charles J. Sharp and T. Michael Keesey · PhyloPic
In 3 days ~80% in a week >90%
The wreathed hornbill (Rhyticeros undulatus) is an Old World tropical bird of the hornbill family Bucerotidae, also called bar-pouched wreathed hornbill due to its distinctive blue-black band on its lower throat sac. It is named after its characteristic long, curved bill that develops ridges, or wreaths, on the casque of the upper mandible in adults. Males are black with a rufous crown, a white upper breast and face, and a yellow featherless throat. Females are uniformly black with a blue throat and are slightly smaller than males.
The wreathed hornbill ranges across the foothills and evergreen forests of Northeast India and Bhutan to Bangladesh, Southeast Asia and the Greater Sunda Islands. It is a frugivore and feeds mainly on large fruits, which it swallows whole leaving the seeds intact. This feeding behaviour plays an important ecological role for the long-distance seed dispersal in forest ecosystems.
The wreathed hornbill is threatened by hunting, habitat fragmentation and deforestation. It has been listed as Vulnerable on the IUCN Red List since 2018, as the global population is estimated to decrease due to these threats.
English ornithologist George Shaw first... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Namdapha National Park | 🇮🇳 India | |
| 2 | Khao Yai National Park | 🇹🇭 Thailand | |
| 3 | Danum Valley Conservation Area | 🇲🇾 Malaysia | |
| 4 | Kerinci Seblat National Park | 🇮🇩 Indonesia | |
| 5 | Khao Sok National Park | 🇹🇭 Thailand | |
| 6 | Taman Negara National Park | 🇲🇾 Malaysia | |
| 7 | Royal Manas National Park | 🇧🇹 Bhutan | |
| 8 | Gunung Leuser National Park | 🇮🇩 Indonesia | |
| 9 | Kinabatangan Wildlife Sanctuary | 🇲🇾 Malaysia | |
| 10 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 11 | Kinabalu Park | 🇲🇾 Malaysia | |
| 12 | Manas National Park | 🇮🇳 India | |
| 13 | Sepilok | 🇲🇾 Malaysia | |
| 14 | Khao Luang National Park | 🇹🇭 Thailand | |
| 15 | Kaziranga National Park | 🇮🇳 India | |
| 16 | Bali Barat National Park | 🇮🇩 Indonesia | |
| 17 | Cat Tien National Park | 🇻🇳 Vietnam |
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Phnom Penh | 🇰🇭 Cambodia |
Likely
About 40% of wildlife watchers report a Wreathed Hornbill sighting in Khao Yai National Park on a given day, based on 1,084 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 30th most-seen of the 278 birds we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
August
In that month about 60% of wildlife watchers report a Wreathed Hornbill in Khao Yai National Park on a given day, against about 20% in November, the lowest month. That is one of Khao Yai National Park's wettest months, with about 260 mm of rain against 15 mm in December.
Between 2 and 5 am
Across all the parks we cover, that three-hour window holds the most Wreathed Hornbill sightings with a recorded time, and about half of them come between 6 pm and 6 am: it is most active around dawn and dusk.
Among the best
Of the 17 parks where we can rate Wreathed Hornbill sightings, Khao Yai National Park ranks 2nd at about 40%, level with the leaders once rounded. The best odds are in Namdapha National Park (India, about 40%). All parks ranked.
Same family: Bucerotidae
The closest relatives of the Wreathed Hornbill that you can see in Khao Yai National Park (family Bucerotidae, Hornbills) are Oriental Pied Hornbill (about 70%), Great Hornbill (about 50%) and Austen's Brown Hornbill (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Wreathed Hornbill is recorded against all the birds logged in Khao Yai National Park (1,084 verified sightings from 2019 to 2026), calibrated against known sighting rates. Figures are rounded to the nearest 10% because citizen-science data supports honest approximations, not decimals, and months with records from fewer than five people show "—". How it works.
