Tesia olivea
Silhouette: Sheatherius · PhyloPic
In 3 days ~70% 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 |
Possible
About 30% of wildlife watchers report a Slaty-bellied Tesia sighting in Namdapha National Park on a given day, based on 451 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 34th most-seen of the 298 birds we can rate there. Over three days the chance rises to about 70%, and over a week to about 90%, if each day is a fresh chance.
January
In that month about 50% of wildlife watchers report a Slaty-bellied Tesia in Namdapha National Park on a given day, against about 10% in April–May and October, the lowest months. That is one of Namdapha National Park's driest months, with about 50 mm of rain against 660 mm in July. June to September have too few records to rate.
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.
2nd of 5
Of the 5 parks where we can rate Slaty-bellied Tesia sightings, Namdapha National Park ranks 2nd at about 30%. The best odds are in Doi Inthanon National Park (Thailand, about 40%).
GBIF citizen-science records
It is estimated from how often the Slaty-bellied Tesia is recorded against all the birds logged in Namdapha National Park (451 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.
