Zanclostomus calyorhynchus
In 3 days ~90% in a week >90%
The yellow-billed malkoha (Rhamphococcyx calyorhynchus) is a species of cuckoo in the family Cuculidae. It is endemic to Sulawesi, Indonesia. Its natural habitat is subtropical or tropical moist lowland forests. It often follows moor macaques. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Tangkoko Nature Reserve | 🇮🇩 Indonesia |
More parks will be added in future updates.
Likely
About 60% of wildlife watchers report a Yellow-billed Malkoha sighting in Tangkoko Nature Reserve on a given day, based on 648 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 5th most-seen of the 138 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.
June and October
In those months about 70% of wildlife watchers report a Yellow-billed Malkoha in Tangkoko Nature Reserve on a given day, against about 50% in April, July and December, the lowest months.
Between 6 and 9 am
Across all the parks we cover, that three-hour window holds the most Yellow-billed Malkoha sightings with a recorded time, and about 8 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Tangkoko Nature Reserve, in our data
Tangkoko Nature Reserve is the only park on Wallace's Line with enough records to rate Yellow-billed Malkoha sightings: about 60% of wildlife watchers there report one on a given day.
Same family: Cuculidae
The closest relatives of the Yellow-billed Malkoha that you can see in Tangkoko Nature Reserve (family Cuculidae, Cuckoos) are Bay Coucal (about 40%), Asian Koel (about 30%) and Lesser Coucal (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Yellow-billed Malkoha is recorded against all the birds logged in Tangkoko Nature Reserve (648 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.
