Carpococcyx viridis
Silhouette: Nicolas Huet le Jeune and Jean-Gabriel Prêtre (vectorized by T. Michael Keesey) · PhyloPic
In 3 days ~40% in a week ~70%
The Sumatran ground cuckoo (Carpococcyx viridis) is a large, terrestrial species of cuckoo endemic to the forests of Sumatra in Indonesia. It was first described in 1879 and, despite being identified as a separate species in the 1880s, was formerly considered conspecific with the Bornean ground cuckoo until recently being returned to the status of a unique species. Considered endangered species by the IUCN Red List, it was initially known from just eight specimens and evaded notice from 1916 until 1997, when it was rediscovered and photographed. The Sumatran ground cuckoo's diet is thought to consist of invertebrates, small mammals, and reptiles.
The Sumatran ground cuckoo is a large bird of about 55 cm (22 in) in length. Its wings and long, full tail are glossy greenish-black, while its mantle, upper back, neck sides, lower throat, upper breast, covert feathers, and secondary feathers are dull green. Its crown is black, and the bare skin around its eyes are hues of green, lilac, and blue. Its bill and legs are green, and its underparts below the upper breast are cinnamon buff. BirdLife International describes its voice as follows: "Repeated low whistles (falling then... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kerinci Seblat National Park | 🇮🇩 Indonesia |
More parks will be added in future updates.
Possible
About 20% of wildlife watchers report a Sumatran Ground-Cuckoo sighting in Kerinci Seblat National Park on a given day, based on 113 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 72nd most-seen of the 203 birds we can rate there. Over three days the chance rises to about 40%, and over a week to about 70%, if each day is a fresh chance.
June
In that month about 30% of wildlife watchers report a Sumatran Ground-Cuckoo in Kerinci Seblat National Park on a given day, against under 5% in March and May, the lowest months. January has too few records to rate.
Between 3 and 6 am
Across all the parks we cover, that three-hour window holds the most Sumatran Ground-Cuckoo 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.
Only Kerinci Seblat National Park, in our data
Kerinci Seblat National Park is the only park on Wallace's Line with enough records to rate Sumatran Ground-Cuckoo sightings: about 20% of wildlife watchers there report one on a given day.
Same family: Cuculidae
The closest relatives of the Sumatran Ground-Cuckoo that you can see in Kerinci Seblat National Park (family Cuculidae, Cuckoos) are Green-billed Malkoha (about 30%), Lesser Coucal (about 10%) and Sunda Cuckoo (about 10%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Sumatran Ground-Cuckoo is recorded against all the birds logged in Kerinci Seblat National Park (113 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.
