Tesia olivea
Silhouette: Sheatherius · PhyloPic
In 3 days ~20% in a week ~40%
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 |
With luck
About 10% of wildlife watchers report a Slaty-bellied Tesia sighting in Royal Manas National Park on a given day, based on 95 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 177th most-seen of the 388 birds we can rate there. Over three days the chance rises to about 20%, and over a week to about 40%, if each day is a fresh chance.
December
In that month about 30% of wildlife watchers report a Slaty-bellied Tesia in Royal Manas National Park on a given day, against under 5% in March to July, the lowest months. That is one of Royal Manas National Park's driest months, with about 10 mm of rain against 930 mm in July. August and 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.
3rd of 5
Of the 5 parks where we can rate Slaty-bellied Tesia sightings, Royal Manas National Park ranks 3rd at about 10%. The best odds are in Doi Inthanon National Park (Thailand, about 40%) and Namdapha National Park (India, about 30%).
GBIF citizen-science records
It is estimated from how often the Slaty-bellied Tesia is recorded against all the birds logged in Royal Manas National Park (95 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.
