VU
Long-tailed Ground-roller Uratelornis chimaera



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. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- - A2cde+3cde+4cde

Red List history
Year Category Criteria
2021 Vulnerable A2cde+3cde+4cde
2016 Vulnerable A3cd
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 -
Distribution

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 11,500 medium
Number of locations 11-100 -
Severely Fragmented -
Population and trend
Value Data quality Derivation Year of estimate
No. of mature individuals 9487-32687 medium estimated 2007
Population trend Decreasing good inferred -
Decline (3 years/1 generation past) - - -
Decline (5 years/1 generation past) - - -
Decline (10 years/1 generation past) - - -
Decline (10 years/3 generation future) 21-31 - - -
Decline (10 years/3 generation past and future) 21-31 - - -
Number of subpopulations - - -
Percentage in largest subpopulation - - -
Generation length (yrs) 4.9 - - -

Population justification: A total population estimate of 21,124 (with a 95% confidence interval of 9,487-32,687) mature individuals was calculated from a tentative estimate of the species's density at 5.7 (95% CI: 2.6-8.8) mature adults per km2 from transect surveys in 1999 and an estimate of 3,706 km2 of remaining habitat (Seddon and Tobias 2007). The 95% confidence intervals are taken as the upper and lower range estimates for the population.

Trend justification: The population is inferred to be declining in line with continuing habitat loss (Seddon and Tobias 2007; Global Forest Watch 2021). Over the past three generations, this species experienced a loss of 32% forest cover from its range (Global Forest Watch 2021). This species is also threatened by predation from invasive predators and trappers. Hence the overall past rate of decline is suspected to fall in the band of 25-35%. Between 2017-2020 this species's range lost 6.6% forest cover (Global Forest Watch 2021). Projected forwards over 3 generations, this equates to a loss of 23%. Assuming that forest loss continues at a similar rate, and the species remains threatened by invasive predators and trappers, the future rate of decline is suspected to fall in the band 21-31%.


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 Mikea
Madagascar PK32-Ranobe NPA
Madagascar Velondriake MPA

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Artificial/Terrestrial Subtropical/Tropical Heavily Degraded Former Forest major resident
Forest Subtropical/Tropical Dry major resident
Shrubland Subtropical/Tropical Dry major resident
Altitude 0 - 80 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%) 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 Minority (<50%) Negligible declines Low Impact: 4
Stresses
Species mortality
Biological resource use Logging & wood harvesting - Unintentional effects: (large scale) [harvest] Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines 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 Declines Low Impact: 5
Stresses
Ecosystem degradation
Climate change & severe weather Other impacts Timing Scope Severity Impact
Future Whole (>90%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Canis familiaris Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Named species Timing Scope Severity Impact
Ongoing Minority (<50%) Unknown Unknown
Stresses
Reduced reproductive success

Utilisation
Purpose Primary form used Life stage used Source Scale Level Timing
Food - human - - Non-trivial Recent
Pets/display animals, horticulture - - International Non-trivial Recent

Recommended citation
BirdLife International (2022) Species factsheet: Uratelornis chimaera. Downloaded from http://www.birdlife.org on 19/08/2022. Recommended citation for factsheets for more than one species: BirdLife International (2022) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 19/08/2022.