Gorsachius melanolophus
Silhouette: Sheatherius · PhyloPic
In 3 days ~20% in a week ~40%
The Malayan night heron (Gorsachius melanolophus), also known as Malaysian night heron and tiger bittern, is a medium-sized heron. It is distributed in southern and eastern Asia. The Malayan night heron has been found in India, Sri Lanka, Brunei, Nepal, Bangladesh, Myanmar, Cambodia, Laos, Vietnam, Thailand, Malaysia, Singapore, China, Indonesia, the Philippines, Taiwan and Japan. It is a vagrant in Palau and Korea. Its range size is estimated at 1,240,000 km2. One roadkilled bird was discovered on Christmas Island, Australia where it is likely a vagrant. This bird occurs in forests, streams, and marshes. In Japan, population densities of the herons increased as undisturbed forest cover on islands increased.
The Malayan night heron is about 48 cm (19 in) long. The wingspan is about 86 cm (34 in). It is stocky, with a short beak. Its neck and breast are rufous. There are streaks going down the centre of the neck to the breast. The upperparts are chestnut and vermiculated. The flight feathers are blackish. The crown is black, the chin is white, and the eyes are yellow. The beak is black and the legs are greenish. The juvenile is greyish... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 2 | Manas National Park | 🇮🇳 India | |
| 3 | Taroko National Park | 🇹🇼 Taiwan | |
| 4 | Way Kambas National Park | 🇮🇩 Indonesia | |
| 5 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 6 | Periyar National Park | 🇮🇳 India |
With luck
About 10% of wildlife watchers report a Malayan Night Heron sighting in Cuc Phuong National Park on a given day, based on 21 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 85th most-seen of the 159 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
April
In that month about 30% of wildlife watchers report a Malayan Night Heron in Cuc Phuong National Park on a given day, against under 5% in May–June, August and October–February, the lowest months. July has too few records to rate.
Between 3 and 6 pm
Across all the parks we cover, that three-hour window holds the most Malayan Night Heron sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Yes
Of the 6 parks where we can rate Malayan Night Heron sightings, Cuc Phuong National Park has the highest daily chance: about 10%. Next come Manas National Park (India, under 5%) and Taroko National Park (Taiwan, under 5%).
GBIF citizen-science records
It is estimated from how often the Malayan Night Heron is recorded against all the birds logged in Cuc Phuong National Park (21 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.
