Corvus enca
Silhouette: T. Michael Keesey (photo by Bc999 [Black crow]) · PhyloPic
In 3 days ~20% in a week ~40%
The Sunda crow (Corvus enca) is a passerine bird of the family Corvidae that is found in South-East Asia, from Malaysia to Borneo. The Sunda crow is part of the Corvus enca species complex, which was formerly treated as a single species and known as the slender-billed crow. The complex is now treated as five species, after four subspecies were split off as distinct species: the Samar crow or small crow (Corvus samarensis), the Palawan crow (Corvus pusillus), the Sulawesi crow (Corvus celebensis) and the Sierra Madre crow (Corvus sierramadrensis). The violet crow was also once included, but has been shown to be distinct genetically and separated as Corvus violaceus.
Corvus enca was formally described in 1821 by the American naturalist Thomas Horsfield based on a specimen collected on the Indonesian island of Java. He coined the binomial name Fregilus enca. The specific epithet enca is a Javanese word for a crow.
Corvus enca is part of a species complex, which was previously treated as a single species with six subspecies, then known of as the slender-billed crow. Four of those subspecies are now treated as a separate species: Sulawesi crow (Corvus celebensis)
Samar crow... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kinabatangan Wildlife Sanctuary | 🇲🇾 Malaysia | |
| 2 | Danum Valley Conservation Area | 🇲🇾 Malaysia | |
| 3 | Tanjung Puting National Park | 🇮🇩 Indonesia | |
| 4 | Way Kambas National Park | 🇮🇩 Indonesia | |
| 5 | Sepilok | 🇲🇾 Malaysia | |
| 6 | Bali Barat National Park | 🇮🇩 Indonesia | |
| 7 | Taman Negara National Park | 🇲🇾 Malaysia | |
| 8 | Gunung Leuser National Park | 🇮🇩 Indonesia | |
| 9 | Kinabalu Park | 🇲🇾 Malaysia |
With luck
About 10% of wildlife watchers report a Slender-billed Crow sighting in Gunung Leuser National Park on a given day, based on 19 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 85th most-seen of the 166 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.
October
In that month about 30% of wildlife watchers report a Slender-billed Crow in Gunung Leuser National Park on a given day, against under 5% in April–September and November–January, the lowest months.
Between midnight and 3 am
Across all the parks we cover, that three-hour window holds the most Slender-billed Crow sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is most active around dawn and dusk.
8th of 9
Of the 9 parks where we can rate Slender-billed Crow sightings, Gunung Leuser National Park ranks 8th at about 10%. The best odds are in Kinabatangan Wildlife Sanctuary (Malaysia, about 60%), Danum Valley Conservation Area (Malaysia, about 50%) and Tanjung Puting National Park (Indonesia, about 30%).
Same order: Passeriformes
The closest relatives of the Slender-billed Crow that you can see in Gunung Leuser National Park (order Passeriformes, Perching Birds) are Yellow-vented Bulbul (about 50%), Pin-striped Tit-Babbler (about 40%) and Pacific Swallow (about 40%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Slender-billed Crow is recorded against all the birds logged in Gunung Leuser National Park (19 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.
