Iole propinqua
Silhouette: PhyloPic
In 3 days ~50% in a week ~80%
The grey-eyed bulbul (Iole propinqua) is a species of songbird in the bulbul family, Pycnonotidae. It is found in Southeast Asia in its natural habitat of subtropical or tropical moist lowland forests. The grey-eyed bulbul was originally described in the genus Criniger and classified by some authorities within the genus Hypsipetes. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Khao Yai National Park | 🇹🇭 Thailand | |
| 2 | Cat Tien National Park | 🇻🇳 Vietnam | |
| 3 | Cuc Phuong National Park | 🇻🇳 Vietnam | |
| 4 | Doi Inthanon National Park | 🇹🇭 Thailand |
Possible
About 20% of wildlife watchers report a Gray-eyed Bulbul sighting in Cuc Phuong National Park on a given day, based on 58 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 43rd most-seen of the 159 birds we can rate there. Over three days the chance rises to about 50%, and over a week to about 80%, if each day is a fresh chance.
February and November
In those months about 30% of wildlife watchers report a Gray-eyed Bulbul in Cuc Phuong National Park on a given day, against about 10% in April, June and August–October, the lowest months. Those are among Cuc Phuong National Park's driest months, with about 60 mm of rain a month against 390 mm in August. July has too few records to rate.
Between 3 and 6 am
Across all the parks we cover, that three-hour window holds the most Gray-eyed Bulbul sightings with a recorded time, and about half of them come between 6 am and 6 pm: it is most active around dawn and dusk.
3rd of 4
Of the 4 parks where we can rate Gray-eyed Bulbul sightings, Cuc Phuong National Park ranks 3rd at about 20%. The best odds are in Khao Yai National Park (Thailand, about 50%) and Cat Tien National Park (Vietnam, about 30%). All parks ranked.
Same family: Pycnonotidae
The closest relatives of the Gray-eyed Bulbul that you can see in Cuc Phuong National Park (family Pycnonotidae, Bulbuls) are Black-crested Bulbul (about 50%), Puff-throated Bulbul (about 50%) and Stripe-throated Bulbul (about 30%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Gray-eyed Bulbul is recorded against all the birds logged in Cuc Phuong National Park (58 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.
