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Madagascar Serpent-eagle Eutriorchis astur

IUCN Red List Criteria

Critically Endangered  
Endangered C2a(i) 
Vulnerable B1ab(ii,iii,v);C2a(i);D1 

IUCN Red List history

Year Category
2012 Endangered
2008 Endangered
2004 Endangered
2000 Critically Endangered
1996 Critically Endangered
1994 Critically Endangered
1988 Threatened

Species attributes

Migratory status not a migrant Forest dependency High
Land mass type shelf island
Average mass -

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 17,300 medium
Number of locations 11-100 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 250-999 poor Estimated 2011
Population trend Decreasing medium -
Number of subpopulations 2-100 - - -
Largest subpopulation 1-50 - - -
Generation length (yrs) 12.9 - - -
Population justification: The population is estimated at 66-1,660 individuals (0.04-1 individuals/km2 x 1,660 km2), but is perhaps best placed in the band 250-999 mature individuals. This equates to 375-1,499 individuals in total, rounded here to 350-1,500 individuals. Hawkins (in litt. 2003) suggests the total population is certainly not less than 250 individuals, and L.-A. Rene de Roland in litt. (2012) suggests 250-650 individuals. Assuming a body mass of 800-1,200 g, data in Newton (1979) suggests a breeding density of c. 0.04-1 birds/km2, however the body mass has since been estimated to average 700 g for males and 800 g for females (L.-A. Rene de Roland in litt. 2012).
Trend justification: Hawkins in litt (2003) suggests that the population decrease cannot be more than 30% over the past ten years.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage
Madagascar Native Extant      

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Madagascar Ambatovaky Special Reserve site factsheet
Madagascar Anjanaharibe Sud Special Reserve site factsheet
Madagascar Makira SAPM site factsheet
Madagascar Mantadia National Park and Analamazaotra Special Reserve site factsheet
Madagascar Marojejy National Park site factsheet
Madagascar Marotandrano Special Reserve site factsheet
Madagascar Masoala National Park site factsheet
Madagascar Tsaratanana Strict Nature Reserve and surrounding areas site factsheet
Madagascar Zahamena National Park site factsheet
Madagascar Zahamena-Mantadia SAPM site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Arable Land marginal resident
Forest Subtropical/Tropical Moist Lowland major resident
Altitude 0 - 1500 m Occasional altitudinal limits  

Threats & impact

Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops / Shifting agriculture Timing Scope Severity Impact
Ongoing Majority (50-90%) Rapid Declines Medium Impact:
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals / Persecution/control Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Species mortality
Biological resource use Hunting & trapping terrestrial animals / Unintentional effects (species is not the target) Timing Scope Severity Impact
Ongoing Unknown Unknown Unknown
Stresses
Competition
Biological resource use Logging & wood harvesting / Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Energy production & mining Mining & quarrying Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Human intrusions & disturbance Work & other activities Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact:
Stresses
Species disturbance
Natural system modifications Fire & fire suppression / Increase in fire frequency/intensity Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Decline Medium Impact:
Stresses
Ecosystem degradation, Ecosystem conversion

Utilisation

Purpose Primary form used Life stage used Source Scale Level Timing
Pets Whole Adults and juveniles Wild International Non-trivial Recent

Recommended citation
BirdLife International (2014) Species factsheet: Eutriorchis astur. Downloaded from http://www.birdlife.org on 20/04/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 20/04/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Endangered
Family Accipitridae (Osprey, kites, hawks and eagles)
Species name author (Sharpe, 1875)
Population size 250-999 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 17,300 km2
Country endemic? Yes
Links to further information
- Summary information on this species