Orthotomus sepium
Silhouette: Sheatherius · PhyloPic
In 3 days ~90% in a week >90%
The olive-backed tailorbird (Orthotomus sepium) is a species of passerine bird formerly placed in the "Old World warbler" assemblage, it but now placed in the family Cisticolidae. It is endemic to the islands of Java, Madura Island, Bali and Lombok. It resides in open forests, often perching on short trees and shrubs.
It is small, with a rust-colored head. It is insectivorous. It forages for caterpillars, spiders, and small insects. It is often seen in groups, and is known to engage in group vocalizations. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Bali Barat National Park | 🇮🇩 Indonesia |
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Jakarta | 🇮🇩 Indonesia | |
| 2 | Denpasar | 🇮🇩 Indonesia | |
| 3 | Yogyakarta | 🇮🇩 Indonesia | |
| 4 | Bandung | 🇮🇩 Indonesia |
Likely
About 60% of wildlife watchers report an Olive-backed Tailorbird sighting in Bali Barat National Park on a given day, based on 641 verified sightings from GBIF citizen-science data from 2019 to 2026. It is the 11th most-seen of the 173 birds we can rate there. Over three days the chance rises to about 90%, and over a week to over 90%, if each day is a fresh chance.
June and August
In those months about 70% of wildlife watchers report an Olive-backed Tailorbird in Bali Barat National Park on a given day, against about 40% in December, the lowest month. Those are among Bali Barat National Park's driest months, with about 30 mm of rain a month against 280 mm in February.
Between 2 and 5 am
Across all the parks we cover, that three-hour window holds the most Olive-backed Tailorbird sightings with a recorded time, and about 7 in 10 of them come between 6 pm and 6 am: it is mostly seen at night.
Only Bali Barat National Park, in our data
Bali Barat National Park is the only park on Wallace's Line with enough records to rate Olive-backed Tailorbird sightings: about 60% of wildlife watchers there report one on a given day.
Same family: Cisticolidae
The closest relatives of the Olive-backed Tailorbird that you can see in Bali Barat National Park (family Cisticolidae, Cisticolas and Allies) are Zitting Cisticola (about 20%) and Bar-winged Prinia (about 20%), with each one's daily chance of a sighting.
GBIF citizen-science records
It is estimated from how often the Olive-backed Tailorbird is recorded against all the birds logged in Bali Barat National Park (641 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.
