Locustella pryeri
In 3 days <5%
The marsh grassbird (Helopsaltes pryeri), also known as the Japanese swamp warbler, is a species of Old World warbler in the family Locustellidae. It is found in China, Japan, South Korea, Mongolia, and Russia. Its natural habitat is swamps. It is threatened by habitat loss. Wikipedia →
| # | Park | Country | Daily sighting probability |
|---|
More parks will be added in future updates.
| # | City | Country | Daily sighting probability |
|---|---|---|---|
| 1 | Beijing | 🇨🇳 China |
Rare
Under 5% of wildlife watchers report a Marsh Grassbird sighting in Beijing on a given day, based on 35 verified sightings from GBIF citizen-science data. It is the 247th most-seen of the 324 birds we can rate there. Over three days the chance rises to under 5%, if each day is a fresh chance.
August
In that month about 10% of wildlife watchers report a Marsh Grassbird in Beijing on a given day, against under 5% in September to July, the lowest months. That is one of Beijing's wettest months, with about 110 mm of rain against almost none in January.
Between 1 and 4 pm
Across all the parks we cover, that three-hour window holds the most Marsh Grassbird sightings with a recorded time, and about 9 in 10 of them come between 6 am and 6 pm: it is a daytime animal.
Only Beijing, in our data
Beijing is the only city on Wallace's Line with enough records to rate Marsh Grassbird sightings: under 5% of wildlife watchers there report one on a given day.
GBIF citizen-science records
It is estimated from how often the Marsh Grassbird is recorded against all the birds logged in Beijing (35 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.
