Zanclostomus javanicus
Silhouette: Nicolas Huet le Jeune and Jean-Gabriel Prêtre (vectorized by T. Michael Keesey) · PhyloPic
In 3 days ~30% in a week ~50%
The red-billed malkoha (Zanclostomus javanicus) is a species of cuckoo in the family Cuculidae. It is found in Brunei, Indonesia, Malaysia, Myanmar, and Thailand. Its natural habitat is subtropical or tropical dry forests.
The genus Zanclostomus was introduced in 1837 by the English naturalist William Swainson to accommodate the red-billed malkoha. The genus name combines the Ancient Greek zanklon meaning "sickle" or "reaping hook" with stoma meaning "mouth". Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Way Kambas National Park | 🇮🇩 Indonesia | |
| 2 | Khao Luang National Park | 🇹🇭 Thailand | |
| 3 | Danum Valley Conservation Area | 🇲🇾 Malaysia | |
| 4 | Khao Sok National Park | 🇹🇭 Thailand | |
| 5 | Gunung Leuser National Park | 🇮🇩 Indonesia | |
| 6 | Taman Negara National Park | 🇲🇾 Malaysia | |
| 7 | Sepilok | 🇲🇾 Malaysia | |
| 8 | Kinabatangan Wildlife Sanctuary | 🇲🇾 Malaysia | |
| 9 | Kaeng Krachan National Park | 🇹🇭 Thailand |
With luck
About 10% of wildlife watchers report a Red-billed Malkoha sighting in Khao Sok National Park on a given day, based on 69 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 99th most-seen of the 213 birds we can rate there. Over three days the chance rises to about 30%, and over a week to about 50%, if each day is a fresh chance.
March and May
In those months about 20% of wildlife watchers report a Red-billed Malkoha in Khao Sok National Park on a given day, against under 5% in June–July and September–January, the lowest months.
Between 7 and 10 am
Across all the parks we cover, that three-hour window holds the most Red-billed Malkoha sightings with a recorded time, and nearly all of them come between 6 am and 6 pm: it is a daytime animal.
4th of 9
Of the 9 parks where we can rate Red-billed Malkoha sightings, Khao Sok National Park ranks 4th at about 10%. The best odds are in Way Kambas National Park (Indonesia, about 30%), Khao Luang National Park (Thailand, about 10%) and Danum Valley Conservation Area (Malaysia, about 10%).
GBIF citizen-science records
It is estimated from how often the Red-billed Malkoha is recorded against all the birds logged in Khao Sok National Park (69 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.
