Corvus enca
Silhouette: T. Michael Keesey (photo by Bc999 [Black crow]) · PhyloPic
In 3 days ~90% in a week >90%
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 |
Likely
About 50% of wildlife watchers report a Slender-billed Crow sighting in Danum Valley Conservation Area on a given day, based on 919 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 4th most-seen of the 258 birds we can rate there. Over three days the chance rises to about 90%, and over a week to over 90%, if each day is a fresh chance.
February
In that month about 70% of wildlife watchers report a Slender-billed Crow in Danum Valley Conservation Area on a given day, against about 40% in May–June and December, the lowest months. That is one of Danum Valley Conservation Area's driest months, with about 140 mm of rain against 290 mm in May.
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.
2nd of 9
Of the 9 parks where we can rate Slender-billed Crow sightings, Danum Valley Conservation Area ranks 2nd at about 50%. The best odds are in Kinabatangan Wildlife Sanctuary (Malaysia, about 60%).
Same family: Corvidae
The closest relatives of the Slender-billed Crow that you can see in Danum Valley Conservation Area (family Corvidae, Crows, Jays, and Magpies) are Bornean Black Magpie (about 20%) and Crested Jay (about 10%), 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 Danum Valley Conservation Area (919 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.
