email a friend
printable version
CR
Long-billed Tailorbird Artisornis moreaui

IUCN Red List Criteria

Critically Endangered C2a(ii) 
Endangered B1ab(i,ii,iii,iv,v);C2a(i,ii);D 
Vulnerable B1ab(i,ii,iii,iv,v);C2a(i,ii);D1+2 

IUCN Red List history

Year Category
2012 Critically Endangered
2011 Critically Endangered
2010 Critically Endangered
2009 Critically Endangered
2008 Critically Endangered
2004 Critically Endangered
2000 Critically Endangered
1996 Critically Endangered
1994 Critically Endangered
1988 Threatened

Species attributes

Migratory status not a migrant Forest dependency High
Land mass type continent
Average mass 9.1 g

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 950 medium
Number of locations 2-5 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 50-249 medium Estimated 2000
Population trend Decreasing poor -
Number of subpopulations 2-100 - - -
Largest subpopulation 51-250 - - -
Generation length (yrs) 3.6 - - -
Population justification: Cordeiro (2000) esimated 150-200 in Amani Nature Reserve. The populations on Mount Nilo and the Njesi Plateau are unknown, but may be small, so the global estimate is placed precautionarily in the band 50-249 individuals. This equates to 33-166 mature individuals, rounded here to 30-200 mature individuals.
Trend justification: This species is suspected to be declining in parts of its range owing to strong pressures that are impacting unprotected forests in parts of the East Usambaras and Njesi Plateau, and recent disturbance within protected areas such as Amani Nature Reserve. Therefore, we employ a negative population trend overall (though this may be slight). If further research confirms that the species's global population size is stable it may warrant downlisting in the future.

Country/Territory distribution

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

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Mozambique Njesi plateau site factsheet
Tanzania East Usambara Mountains site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Forest Subtropical/Tropical Moist Lowland suitable resident
Forest Subtropical/Tropical Moist Montane major resident
Shrubland Subtropical/Tropical Moist suitable resident
Altitude 800 - 1250 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 Minority (<50%) Slow, Significant Decline 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 Majority (50-90%) Slow, Significant Decline Medium Impact: 6
Stresses
Ecosystem degradation
Climate change & severe weather Habitat shifting & alteration Timing Scope Severity Impact
Future Whole (>90%) Unknown Unknown
Stresses
Indirect ecosystem effects, Ecosystem degradation
Invasive and other problematic species, genes & diseases Invasive non-native/alien species/diseases / umbrella tree (Maesopsis eminii) Timing Scope Severity Impact
Ongoing Majority (50-90%) Unknown Unknown
Stresses
Ecosystem degradation

Recommended citation
BirdLife International (2014) Species factsheet: Artisornis moreaui. Downloaded from http://www.birdlife.org on 24/10/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 24/10/2014.

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 Critically Endangered
Family Sylviidae (Old World warblers)
Species name author (Sclater, 1931)
Population size 50-249 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 950 km2
Country endemic? No
Links to further information
- Summary information on this species