email a friend
printable version
NT
Dja River Warbler Bradypterus grandis

IUCN Red List Criteria

Near Threatened (criteria nearly met) D1 

IUCN Red List history

Year Category
2012 Near Threatened
2008 Near Threatened
2004 Near Threatened
2000 Vulnerable
1996 Data Deficient
1994 Data Deficient
1988 Threatened

Species attributes

Migratory status not a migrant Forest dependency Does not normally occur in forest
Land mass type continent
Average mass -

Distribution

  Estimate Data quality
Extent of Occurrence breeding/resident (km2) 12,400 medium
Number of locations 8 -
Fragmentation -

Population & trend

  Estimate Data quality Derivation Year of estimate
No. of mature individuals 600-1700 poor Estimated 2003
Population trend Decreasing -
Number of subpopulations 2-100 - - -
Largest subpopulation - - -
Generation length (yrs) 3.5 - - -
Population justification: Fontaine (2003) suggests its population is 'not more than a few thousand individuals', and so it is placed in the band 1,000-2,499 individuals here. This is equivalent to 667-1,666 mature individuals, rounded here to 600-1,700 mature individuals.
Trend justification: The population is suspected to be in decline owing to ongoing habitat destruction.

Country/Territory distribution

Country/Territory Occurrence status Presence Breeding Non-breeding Passage Resident
Cameroon Native Extant       Yes
Central African Republic Native Extant       Yes
Gabon Native Extant       Yes

Important Bird Areas where this species has triggered the IBA criteria

Country/Territory IBA Name IBA link
Cameroon Lobéké National Park site factsheet
Cameroon Nki site factsheet
Central African Republic Dzanga-Ndoki National Park site factsheet
Gabon Lopé Faunal Reserve site factsheet

Habitats & altitude

Habitat (level 1) Habitat (level 2) Importance Occurrence
Wetlands (inland) Bogs, Marshes, Swamps, Fens, Peatlands major resident
Altitude 400 - 800 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
Future Majority (50-90%) Slow, Significant Decline Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion
Biological resource use Logging & wood harvesting / Unintentional effects: (subsistence/small scale) [harvest] Timing Scope Severity Impact
Future Majority (50-90%) Slow, Significant Decline Low Impact: 4
Stresses
Ecosystem degradation, Ecosystem conversion

Recommended citation
BirdLife International (2014) Species factsheet: Bradypterus grandis. Downloaded from http://www.birdlife.org on 26/11/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 26/11/2014.

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 Near Threatened
Family Sylviidae (Old World warblers)
Species name author Ogilvie-Grant, 1917
Population size 600-1700 mature individuals
Population trend Decreasing
Distribution size (breeding/resident) 12,400 km2
Country endemic? No
Links to further information
- Summary information on this species
- Projected distributions under climate change