Marsh Grassbird

Helopsaltes pryeri (Seebohm, 1884)

≈12 cmLength14 gWeight

This marsh-dwelling warbler is threatened by habitat loss.

Busiest months: April · Most records: China, Japan, Mongolia

Least Concern

How to identify

Where and when it's recorded

Marsh Grassbird has been recorded at 69 of the 8,171 birding hotspots we track, in 4 countries and regions.

Records by month Northern Hemisphere

Where it's recorded most

Nanhui DongtanChina220 records
Inashiki – Kasumigaura – Ukishima Marsh and Myoginohana Bird BlindJapan84 records
Tochigi – Watarase GreenspaceJapan48 records

More places

Tochigi – Watarase Retention Ponds / Yanaka LakeJapan43 records
NanjishanChina32 records
Chongming Dongtan NNRChina31 records
Poyang Lake National Wetland ParkChina23 records
Wu ChengChina21 records
Mai Po NR #8b Reedbed RingingHong Kong (China)18 records
Mai Po NR – #8b ReedbedHong Kong (China)18 records

Countries and regions with the most records

China Japan Mongolia Thailand

eBird records via GBIF up to 2024-12-31. A record means someone listed it; more records partly mean more birders, not more birds.

About

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.

Excerpt from Wikipedia, CC BY-SA 4.0 · authors · Read more on Wikipedia

Questions

How big is the Marsh Grassbird?

The Marsh Grassbird is about ≈12 cm long and weighs around 14 g.

Where does the Marsh Grassbird live?

Its breeding range: Palearctic: northeastern Mongolia to Primorskiy (far southeastern Russia), northeastern, eastern China and Honshu (central Japan). It is most often recorded in China, Japan and Mongolia.