Helopsaltes fasciolatus
In 3 days ~10%
Gray's grasshopper warbler (Helopsaltes fasciolatus), also known as Gray's warbler, is a species of bird in the family Locustellidae; it was formerly included in the "Old World warbler" assemblage. The Sakhalin grasshopper warbler was formerly considered conspecific.
This small passerine bird breeds in southern Siberia, northeastern China and Korea. It is migratory, wintering in southeast Asia. It is a species found in lowland and coastal regions, nesting in forests or thickets. The adult has an unstreaked olive-brown back, uniformly grey breast and buff underparts, with unmottled dull orange undertail coverts.
The song is a short phrase, loud and distinctive; nothing like the insect-like reeling of European Locustella species, and more musical than that of Pallas's grasshopper warbler. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Kaohsiung | 🇹🇼 Taiwan |
Rare
Under 5% of wildlife watchers report a Gray's Grasshopper-Warbler sighting in Kaohsiung on a given day, based on 106 verified sightings from GBIF citizen-science data. It is the 102nd most-seen of the 214 birds we can rate there. Over three days the chance rises to about 10%, if each day is a fresh chance.
May
In that month about 20% of wildlife watchers report a Gray's Grasshopper-Warbler in Kaohsiung on a given day, against under 5% in June to April, the lowest months.
Only Kaohsiung, in our data
Kaohsiung is the only city on Wallace's Line with enough records to rate Gray's Grasshopper-Warbler sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Gray's Grasshopper-Warbler is recorded against all the birds logged in Kaohsiung (106 verified sightings), 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.
