Horornis flavolivaceus
Silhouette: Sheatherius · PhyloPic
In 3 days ~10%
The aberrant bush warbler (Horornis flavolivaceus) is a species in the bush warbler family, Cettiidae. It was formerly included in the "Old World warbler" assemblage. It is found in central and southern China, and the northern extremes of Myanmar and Vietnam. It occurs in the countries of Bhutan, China, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Philippines, Thailand, Timor-Leste and Vietnam and also may occur in northeastern and southeastern Bangladesh.
The aberrant bush warbler was formally described in 1845 by the English zoologist Edward Blyth based on a specimen collected in Nepal. He placed the species in the genus Neornis and coined the binomial name Neornis flavolivacea. The specific epithet flavolivaceus combines the Latin flavus meaning "yellow" with the Modern Latin olivaceus meaning "olive-green". The aberrant bush warbler is now placed in the genus Horornis that was introduced in 1845 by Brian Hodgson.
Thirteen subspecies are recognised: H. f... Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kinabalu Park | 🇲🇾 Malaysia | |
| 2 | Langtang National Park | 🇳🇵 Nepal | |
| 3 | Kerinci Seblat National Park | 🇮🇩 Indonesia | |
| 4 | Chitwan National Park | 🇳🇵 Nepal | |
| 5 | Jim Corbett National Park | 🇮🇳 India | |
| 6 | Doi Inthanon National Park | 🇹🇭 Thailand |
Rare
Under 5% of wildlife watchers report an Aberrant Bush-Warbler sighting in Chitwan National Park on a given day, based on 26 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 248th most-seen of the 367 birds we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
February
In that month about 10% of wildlife watchers report an Aberrant Bush-Warbler in Chitwan National Park on a given day, against under 5% in March to January, the lowest months. That is one of Chitwan National Park's driest months, with about 30 mm of rain against 660 mm in July.
Between 2 and 5 am
Across all the parks we cover, that three-hour window holds the most Aberrant Bush-Warbler sightings with a recorded time, and about 6 in 10 of them come between 6 pm and 6 am: it is most active around dawn and dusk.
4th of 6
Of the 6 parks where we can rate Aberrant Bush-Warbler sightings, Chitwan National Park ranks 4th at under 5%. The best odds are in Kinabalu Park (Malaysia, about 40%), Langtang National Park (Nepal, about 10%) and Kerinci Seblat National Park (Indonesia, about 10%).
GBIF citizen-science records
It is estimated from how often the Aberrant Bush-Warbler is recorded against all the birds logged in Chitwan National Park (26 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.
