LC
Middendorff's Grasshopper-warbler Helopsaltes ochotensis



Taxonomy

Taxonomic note

Taxonomic source(s)
AOU. 1998. Check-list of North American birds. American Ornithologists' Union, Washington, D.C.
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.

IUCN Red List criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - -

Red List history
Year Category Criteria
2016 Least Concern
2012 Least Concern
2009 Least Concern
2008 Least Concern
2004 Least Concern
2000 Lower Risk/Least Concern
1994 Lower Risk/Least Concern
1988 Lower Risk/Least Concern
Species attributes

Migratory status full migrant Forest dependency does not normally occur in forest
Land-mass type Average mass -
Range

Estimate Data quality
Extent of Occurrence (breeding/resident) 2,940,000 km2
Extent of Occurrence (non-breeding) 1,530,000 km2
Severely fragmented? no -
Population
Estimate Data quality Derivation Year of estimate
Population size unknown - - -
Population trend decreasing - suspected -
Generation length 3.7 years - - -

Population justification: The global population size has not been quantified, but the species is described as often common and locally abundant (del Hoyo et al. 2006), while national population estimates include: c.50-1,000 individuals on migration and c.50-1,000 wintering individuals in Taiwan; c.50-1,000 individuals on migration in Korea; < c.100,000 breeding pairs and < c.1,000 wintering individuals in Japan and c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in Russia (Brazil 2009).

Trend justification: The population is suspected to be in decline owing to ongoing habitat destruction.


Country/territory distribution
Country/Territory Presence Origin Resident Breeding visitor Non-breeding visitor Passage migrant
Brunei extant native
China (mainland) extant native
Hong Kong (China) extant vagrant
Indonesia extant native
Japan extant native
Malaysia extant native
Philippines extant native
Russia extant native
Russia (Asian) extant native
South Korea extant native
Taiwan, China extant native
USA extant vagrant

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Japan Akan, Kussharo
Japan Hidaka mountains
Japan Kiritappu marsh, Biwase bay
Japan Lake Furen, On-netou
Japan Mount Taisetsu
Japan Notsuke, Odaitou
Japan Shikotsu, Toya
Japan Shiretoko, Mount Syari-dake
Japan Yakumo
Russia (Asian) Malkachan bay
Russia (Asian) Mukhtel' lake
Russia (Asian) Schast'ya Gulf
Russia (Asian) Shantarskiye Islands

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Grassland Subtropical/Tropical Seasonally Wet/Flooded suitable non-breeding
Grassland Temperate suitable breeding
Shrubland Subtropical/Tropical Moist suitable non-breeding
Shrubland Temperate suitable breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable non-breeding
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable breeding
Wetlands (inland) Permanent Freshwater Lakes (over 8ha) suitable breeding
Altitude   Occasional altitudinal limits  

Recommended citation
BirdLife International (2024) Species factsheet: Middendorff's Grasshopper-warbler Helopsaltes ochotensis. Downloaded from https://datazone.birdlife.org/species/factsheet/middendorffs-grasshopper-warbler-helopsaltes-ochotensis on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 23/12/2024.