EN
Madagascar Marsh-harrier Circus macrosceles



Taxonomy

Taxonomic source(s)
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
del Hoyo, J.; Collar, N. J.; Christie, D. A.; Elliott, A.; Fishpool, L. D. C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Barcelona, Spain and Cambridge UK: Lynx Edicions and BirdLife International.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- C2a(i); D C2a(i); D1

Red List history
Year Category Criteria
2016 Endangered C2a(i); D
2012 Vulnerable C2a(i);D1
2008 Vulnerable C2a(i); D1
2007 Vulnerable
2004 Vulnerable
2000 Vulnerable
1994 Not Recognised
1988 Not Recognised
Species attributes

Migratory status not a migrant Forest dependency Does not normally occur in forest
Land mass type Land-mass type - shelf island
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 707,000 medium
Number of locations 11-100 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 100-249 poor suspected 2016
Population trend Decreasing poor suspected -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 10-19 - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations 2-100 - - -
Largest subpopulations 1-89 - - -
Generation length (yrs) 6 - - -

Population justification: Surveys in 2005-2006 of 71% of the potential harrier habitat in Madagascar recorded a total of 80 individuals. The population on Comoros (three separate subpopulations on Grande Comore, Moheli and Anjouan), where its habitat is nearly totally destroyed, is estimated at no more than 50 mature individuals (R. Thorstrom and L.-A. Rene de Roland in litt. 2007). The total population is here estimated to be less than 250 mature individuals (R. Thorstrom in litt. 2016), placed in the range of 100-249 mature individuals.

Trend justification: The population is suspected to be in moderate decline on the basis of the loss and degradation of breeding habitat, persecution and disturbance.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Comoros N Extant Yes
Madagascar N Extant Yes
Mayotte (to France) N Possibly Extinct Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Madagascar Bongolava Classified Forest (Marosely) NPA
Madagascar Lake Ihotry Hunting Reserve and the Mangoky Delta complex
Madagascar NAP Corridor Ambositra-Vondrozo (COFAV) (part of)
Madagascar Areas surrounding Zombitse-Vohibasia National Park
Madagascar Ranomafana North
Madagascar Ambositra-Vondrozo Corridor NPA (COFAV)
Comoros Moya Forest
Madagascar Tsingy de Bemaraha National Park and Strict Nature Reserve
Madagascar Bemamba Wetland Complex
Comoros Mont Mlédjélé (Mwali highlands)
Madagascar Ankaizina wetlands
Comoros Karthala Mountains
Comoros La Grille Mountains
Comoros Mont Ntringui (Ndzuani highlands)
Madagascar Antrema NPA
Madagascar Bemanevika NPA / Tsaratanana massif (south-west)
Madagascar Lake Ihotry - Mangoky Delta Complex NPA
Madagascar Mahavavy - Kinkony wetlands NPA
Madagascar Marotandrano Special Reserve
Madagascar Lake Alaotra NPA
Madagascar Lake Itasy
Madagascar Lake Ihotry - Mangoky Delta Complex NPA
Madagascar Zombitse-Vohibasia National Park and extension
Madagascar Menarandra Forest / Vohindefo NPA
Madagascar Ranomafana National Park and extension
Madagascar Andringitra National Park
Madagascar Parc National d'Isalo
Madagascar Vondrozo Classified Forest NPA
Madagascar Kalambatritra Special Reserve

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Arable Land suitable resident
Grassland Subtropical/Tropical Dry suitable resident
Grassland Subtropical/Tropical High Altitude major resident
Grassland Subtropical/Tropical Seasonally Wet/Flooded suitable resident
Marine Coastal/Supratidal Coastal Freshwater Lakes suitable resident
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable resident
Wetlands (inland) Permanent Freshwater Lakes (over 8ha) suitable resident
Altitude 0 - 2000 m Occasional altitudinal limits (max) 3000 m

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops - Small-holder farming Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals - Intentional use (species is the target) Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Reduced reproductive success, Species mortality
Biological resource use Hunting & trapping terrestrial animals - Persecution/control Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Species mortality
Human intrusions & disturbance Work & other activities Timing Scope Severity Impact
Ongoing Majority (50-90%) No decline Low Impact: 5
Stresses
Species disturbance
Natural system modifications Fire & fire suppression - Trend Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Reduced reproductive success

Recommended citation
BirdLife International (2021) Species factsheet: Circus macrosceles. Downloaded from http://www.birdlife.org on 07/03/2021. Recommended citation for factsheets for more than one species: BirdLife International (2021) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 07/03/2021.