EN
Eastern Bristlebird Dasyornis brachypterus



Taxonomy

Taxonomic note

Taxonomic source(s)
Christidis, L. and Boles, W.E. 2008. Systematics and taxonomy of Australian birds. CSIRO Publishing, Collingwood, Australia.
Christidis, L.; Boles, W. E. 2008. Systematics and taxonomy of Australian birds. CSIRO Publishing, Collingwood, Australia.
del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A., Fishpool, L.D.C., Boesman, P. and Kirwan, G.M. 2016. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 2: Passerines. Lynx Edicions and BirdLife International, Barcelona, Spain and Cambridge, UK.

IUCN Red list criteria met and history
Red List criteria met
Critically Endangered Endangered Vulnerable
- B1ab(ii,iii,iv,v)+2ab(ii,iii,iv,v) B1ab(ii,iii,iv,v)+2ab(ii,iii,iv,v)

Red List history
Year Category Criteria
2016 Endangered B1ab(ii,iii,iv,v)+2ab(ii,iii,iv,v)
2013 Endangered B1ab(ii,iii,iv,v)+2ab(ii,iii,iv,v)
2012 Endangered B1ab(ii,iii,iv,v)+2ab(ii,iii,iv,v)
2008 Endangered B1a+b(ii,iii,iv,v); B2a+b(ii,iii,iv,v)
2004 Endangered
2000 Endangered
1996 Vulnerable
1994 Vulnerable
1988 Threatened
Species attributes

Migratory status not a migrant Forest dependency Low
Land mass type Land-mass type - Australia
Average mass -
Extent of occurrence (EOO)

Estimate Data quality
Extent of Occurrence breeding/resident (km2) 102,000 medium
Extent of Occurrence breeding/resident (km2) 29 good
Number of locations 6-10 -
Fragmentation -
Population and trend
Estimate Data quality Derivation Year of estimate
No. of mature individuals 2550 good estimated 2007
Population trend Decreasing medium estimated -
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 5 - - -
Largest subpopulations - - -

Population justification: Garnett et al. (2011) estimate that the declining northern race (monoides) has a population of less than 50 mature individuals and the southern race (brachypterus) is stable at c. 2,500 mature individuals. The overall population is therefore estimated at around 2,550 mature individuals, roughly equivalent to 3,800 individuals in total.

Trend justification: The northern subspecies has decreased from c.206 pairs in 1988 to c.13 pairs in 2007 (D. Stewart in litt. 2007), and although the nominate subspecies is considered stable at present, it is projected to decline in the future as it is likely to suffer declines in its area of occupancy, quality of habitat, and the number of mature individuals and sub-populations owing to destructive fires (Garnett and Crowley 2000).


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

Important Bird and Biodiversity Areas (IBA)
Country/Territory IBA Name
Australia Scenic Rim
Australia Budderoo and Barren Grounds
Australia Jervis Bay
Australia Nadgee to Mallacoota Inlet
Australia Conondale Range

Habitats & altitude
Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Temperate suitable resident
Grassland Temperate suitable resident
Shrubland Temperate major resident
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands suitable resident
Altitude 0 - 1160 m Occasional altitudinal limits  

Threats & impact
Threat (level 1) Threat (level 2) Impact and Stresses
Agriculture & aquaculture Livestock farming & ranching - Agro-industry grazing, ranching or farming Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation, Ecosystem conversion
Human intrusions & disturbance Recreational activities Timing Scope Severity Impact
Ongoing Minority (<50%) Negligible declines Low Impact: 4
Stresses
Species disturbance, Reduced reproductive success
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Felis catus Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Reduced reproductive success, Species mortality
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Sus scrofa Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Species disturbance, Ecosystem degradation
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Unspecified species Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Ecosystem degradation
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases - Vulpes vulpes Timing Scope Severity Impact
Ongoing Minority (<50%) Slow, Significant Declines Low Impact: 5
Stresses
Reduced reproductive success, Species mortality
Natural system modifications Fire & fire suppression - Trend Unknown/Unrecorded Timing Scope Severity Impact
Ongoing Majority (50-90%) Slow, Significant Declines Medium Impact: 6
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2020) Species factsheet: Dasyornis brachypterus. Downloaded from http://www.birdlife.org on 12/08/2020. Recommended citation for factsheets for more than one species: BirdLife International (2020) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 12/08/2020.