Tesia olivea
Silhouette: Sheatherius · PhyloPic
In 3 days ~80% in a week >90%
The slaty-bellied tesia (Tesia olivea) is a species of warbler in the family Cettiidae. It is found in Bangladesh, Bhutan, China, India, Laos, Myanmar, Nepal, Thailand, and Vietnam. Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist montane forest.
Image at ADW Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Doi Inthanon National Park | 🇹🇭 Thailand | |
| 2 | Namdapha National Park | 🇮🇳 India | |
| 3 | Royal Manas National Park | 🇧🇹 Bhutan | |
| 4 | Manas National Park | 🇮🇳 India | |
| 5 | Kaziranga National Park | 🇮🇳 India |
Likely
About 40% of wildlife watchers report a Slaty-bellied Tesia sighting in Doi Inthanon National Park on a given day, based on 1,366 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 16th most-seen of the 367 birds we can rate there. Over three days the chance rises to about 80%, and over a week to over 90%, if each day is a fresh chance.
February and June–July
In those months about 50% of wildlife watchers report a Slaty-bellied Tesia in Doi Inthanon National Park on a given day, against about 30% in October to December, the lowest months.
Between 3 and 6 am
Across all the parks we cover, that three-hour window holds the most Slaty-bellied Tesia 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.
Yes
Of the 5 parks where we can rate Slaty-bellied Tesia sightings, Doi Inthanon National Park has the highest daily chance: about 40%. Next come Namdapha National Park (India, about 30%) and Royal Manas National Park (Bhutan, about 10%).
GBIF citizen-science records
It is estimated from how often the Slaty-bellied Tesia is recorded against all the birds logged in Doi Inthanon National Park (1,366 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.
