Middendorff's Grasshopper-warbler (Helopsaltes ochotensis)

Middendorff's Grasshopper-warbler Helopsaltes ochotensis

Current view: Data table and detailed info

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
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 23/11/2024.
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 23/11/2024.