Corydon sumatranus
Silhouette: Sheatherius · PhyloPic
In 3 days ~50% in a week ~80%
The dusky broadbill (Corydon sumatranus) is a species of bird in the family Eurylaimidae, the broadbills. It is native to Southeast Asia. It may be slowly declining due to habitat loss, especially from logging, but it has a large enough range that it is still considered to be a least-concern species.
This species, like most in its family, is an insectivore. It is mostly a charcoal gray color with a pale-yellow throat and red bill. It has a brown eye ring. There is a single white band on the wings and some white bands on the underside of the tail. The dusky broadbill is found in moist and dry tropical and subtropical broadleaf forests, tropical swamps, and cloud forests with an upper elevation limit of 2000 metres in Thailand, Myanmar, Laos, Vietnam, Cambodia, and Singapore, as well as the islands of Sumatra and Borneo. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Way Kambas National Park | 🇮🇩 Indonesia | |
| 2 | Khao Luang National Park | 🇹🇭 Thailand | |
| 3 | Kaeng Krachan National Park | 🇹🇭 Thailand | |
| 4 | Danum Valley Conservation Area | 🇲🇾 Malaysia | |
| 5 | Kerinci Seblat National Park | 🇮🇩 Indonesia | |
| 6 | Taman Negara National Park | 🇲🇾 Malaysia | |
| 7 | Kinabatangan Wildlife Sanctuary | 🇲🇾 Malaysia | |
| 8 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 9 | Khao Yai National Park | 🇹🇭 Thailand |
Possible
About 20% of wildlife watchers report a Dusky Broadbill sighting in Way Kambas National Park on a given day, based on 61 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 84th most-seen of the 205 birds we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
September
In that month about 40% of wildlife watchers report a Dusky Broadbill in Way Kambas National Park on a given day, against under 5% in October, the lowest month. That is one of Way Kambas National Park's driest months, with about 120 mm of rain against 370 mm in March. November to February have too few records to rate.
Between 8 and 11 am
Across all the parks we cover, that three-hour window holds the most Dusky Broadbill 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 9 parks where we can rate Dusky Broadbill sightings, Way Kambas National Park has the highest daily chance: about 20%. Next come Khao Luang National Park (Thailand, about 20%) and Kaeng Krachan National Park (Thailand, about 10%).
Same family: Eurylaimidae
The closest relatives of the Dusky Broadbill that you can see in Way Kambas National Park (family Eurylaimidae, Asian and Grauer's Broadbills) are Banded Broadbill (about 40%), Green Broadbill (about 30%) and Black-and-red Broadbill (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Dusky Broadbill is recorded against all the birds logged in Way Kambas National Park (61 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.
