VU
Short-legged Ground-roller Brachypteracias leptosomus



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
- - A3bcd

Red List history
Year Category Criteria
2016 Vulnerable A3bcd
2012 Vulnerable A3cd
2008 Vulnerable A3c,d
2004 Vulnerable
2000 Vulnerable
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

Migratory status not a migrant Forest dependency High
Land mass type Land-mass type - shelf island
Average mass 185 g
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 203,000 medium
Number of locations 11-100 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 7800-19600 poor estimated 1999
Population trend Decreasing medium 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) 30-49 - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations 2-100 - - -
Largest subpopulations 1-89 - - -
Generation length (yrs) 5.6 - - -

Population justification: The species can be easily overlooked and a study on Masoala peninsula estimated a density of 4 territories per km2, which would have equated to a maximum of approximately 8,800 pairs in the peninsula alone (Thorstrom and Lind 1999). Assuming a conservative measure of 10-25% occupancy of the EOO this would give a total of 3,900-9,800 pairs. This equates to 7,800-19,600 mature individuals.

Trend justification: Modelling the possible effects of climate change have shown that this species's ecological niche may decline by as much as 62% due to climate change over the 50 year period from 2000 to 2050 (Andriamasimanana and Cameron 2013). Assuming a linear decrease, this would equate to a c.26% decline in its ecological niche over its next 3 generations due to climate change alone. Further to this the population is suspected to be declining in line with habitat loss and degradation, and hunting pressure. If present trends continue, the remaining unprotected forest, especially at the lower altitudes preferred by this species, will disappear within decades (Stattersfield et al. 1998). Thus declines of this species within the next 3 generations may be within the 30-49% range.


Country/territory distribution
Country/Territory Occurrence status Presence Resident Breeding Non-breeding Passage
Madagascar N Extant Yes

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Madagascar Ambatovaky Special Reserve
Madagascar Andohahela National Park - Section I
Madagascar Andringitra National Park
Madagascar Anjanaharibe Classified Forest
Madagascar Anjozorobe Forest
Madagascar Ankeniheny Classified Forest
Madagascar Betampona Strict Nature Reserve
Madagascar Bezavona Classified Forest
Madagascar Daraina Forest
Madagascar Mananara-North National Park
Madagascar Mangerivola Special Reserve
Madagascar Mantadia National Park and Analamazaotra Special Reserve
Madagascar Marojejy National Park
Madagascar Masoala National Park
Madagascar Midongy South National Park
Madagascar Onive Classified Forest
Madagascar Ranomafana National Park and extension
Madagascar Sihanaka Forest
Madagascar South Anjanaharibe Special Reserve and extension
Madagascar Tsaratanana Strict Nature Reserve and extension
Madagascar Upper Rantabe Classified Forest
Madagascar Vondrozo Classified Forest NPA
Madagascar Zahamena National Park and Strict Reserve

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland major resident
Forest Subtropical/Tropical Moist Montane suitable resident
Altitude 0 - 1200 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Annual & perennial non-timber crops 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 Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species mortality
Biological resource use Logging & wood harvesting Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Rapid Declines Medium Impact: 6
Stresses
Indirect ecosystem effects, Ecosystem degradation, Ecosystem conversion

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Food (human) Whole Adults and juveniles Wild Non-trivial Recent

Recommended citation
BirdLife International (2019) Species factsheet: Brachypteracias leptosomus. Downloaded from http://www.birdlife.org on 17/11/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 17/11/2019.