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Van Dam's Vanga Xenopirostris damii

IUCN Red List Criteria

Critically Endangered  
Endangered B1ab(i,ii,iii,v) 
Vulnerable B1ab(i,ii,iii,v);D2 

IUCN Red List history

Year Category
2012 Endangered
2008 Endangered
2004 Endangered
2000 Endangered
1996 Vulnerable
1994 Vulnerable
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) 4,991 medium
Number of locations 2 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 1500-7000 poor Estimated 1999
Population trend Decreasing medium -
Number of subpopulations 2-100 - - -
Largest subpopulation 1001-9000 - - -
Generation length (yrs) 7.1 - - -
Population justification: The total population is estimated at 2,272 individuals, thus it may lie at the lower end of the range 2,500-9,999 individuals. This range equates to 1,667-6,666 mature individuals, rounded here to 1,500-7,000 mature individuals. Mizuta et al. (2001) estimate territories of 5-8 ha, non-contiguous separated by c.200m, thus giving a 100m extra buffer around each territory. Hence an 8 ha territory takes up 24 ha. This is equivalent to 4 pairs/km2, or 8 indivs/km2. Habitat area: 20% of 1420 km2 = 284 km2. Total Population: 8 x 284 km2 = 2272 indivs. This estimate may be an optimistic minimum because the Jardin Botanique study site of Mizuta et al. (2001) is likely to have been chosen for ease of study.
Trend justification: The population is suspected to be in decline owing to the ongoing destruction and degradation of its forest habitat (ZICOMA 1999). The likely rate of decline, however, has not been estimated.

Country/Territory distribution

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

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Madagascar Analamera Special Reserve site factsheet
Madagascar Ankarafantsika National Park and Ampijoroa Forestry Station site factsheet
Madagascar Ankarana Special Reserve site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Dry major resident
Altitude 0 - 150 m Occasional altitudinal limits  

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 Decline Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting / Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Causing/Could cause fluct Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting / Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Decline Low Impact: 5
Stresses
Ecosystem degradation
Natural system modifications Fire & fire suppression / Increase in fire frequency/intensity Timing Scope Severity Impact
Ongoing Whole (>90%) Slow, Significant Decline Medium Impact: 7
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2014) Species factsheet: Xenopirostris damii. Downloaded from http://www.birdlife.org on 21/08/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 21/08/2014.

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 Vangidae (Vangas)
Species name author Schlegel, 1866
Population size 1500-7000 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 4,991 km2
Country endemic? Yes
Links to further information
- Summary information on this species