EN
Swierstra's Francolin Pternistis swierstrai



Taxonomy

Taxonomic note
Pternistis swierstrai (del Hoyo and Collar 2014) was previously placed in the genus Francolinus.

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
- B2ab(i,ii,iii,v); C2a(i) B1ab(i,ii,iii,v)+2ab(i,ii,iii,v); C2a(i)

Red List history
Year Category Criteria
2016 Endangered B2ab(i,ii,iii,v);C2a(i)
2012 Endangered B2ab(i,ii,iii,v);C2a(i)
2010 Endangered B2a+b(i,ii,iii,v); C2a(i)
2008 Vulnerable B1a+b(i,ii,iii,v); C2a(i)
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 - continent
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 61,800 medium
Extent of Occurrence breeding/resident (km2) 104 medium
Number of locations 6-10 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 1000-2499 medium estimated 2009
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) - - -
Decline (10 years/3 generation past and future) - - -
Number of subpopulations 2-100 - - -
Largest subpopulations - - -
Generation length (yrs) 3.9 - - -

Population justification: The global population has been estimated at between 465-1,052 pairs and 1,040-2,080 pairs. The latter is an over-estimate unless the species is tolerant of a wider range of habitats than is currently known, hence the global population is best placed in the band 1,000-2,499 mature individuals (M. S. L. Mills in litt. 2010).

Trend justification: This species is suspected to be in decline owing to habitat destruction (Dean 2001; M.S.L. Mills in litt. 2005, 2010) and hunting pressure.


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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Angola Mount Moco

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Montane major resident
Grassland Subtropical/Tropical High Altitude suitable resident
Rocky areas (eg. inland cliffs, mountain peaks) suitable resident
Shrubland Subtropical/Tropical High Altitude major resident
Altitude 2000 - 2500 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
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Hunting & trapping terrestrial animals Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines
Stresses
Species mortality
Biological resource use Logging & wood harvesting Timing Scope Severity Impact
Past, Likely to Return Minority (<50%) Slow, Significant Declines
Stresses
Ecosystem degradation
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown
Stresses
Indirect ecosystem effects, Ecosystem degradation

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: Pternistis swierstrai. Downloaded from http://www.birdlife.org on 21/04/2019. Recommended citation for factsheets for more than one species: BirdLife International (2019) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 21/04/2019.