IUCN Red List Criteria
| Critically Endangered |
|
| Endangered |
|
| Vulnerable |
C1+2a(ii) |
IUCN Red List history
| Year |
Category |
| 2012 |
Vulnerable |
| 2008 |
Vulnerable |
| 2007 |
Vulnerable |
| 2004 |
Least Concern |
| 2000 |
Lower Risk/Least Concern |
| 1994 |
Lower Risk/Least Concern |
| 1988 |
Lower Risk/Least Concern |
Species attributes
| Migratory status |
not a migrant |
Forest dependency |
Does not normally occur in forest |
| Land mass type |
|
Average mass |
- |
Distribution
| |
Estimate |
Data quality |
| Extent of Occurrence breeding/resident (km2) |
6,910,000 |
medium |
| Number of locations |
11-100 |
- |
| Fragmentation |
|
- |
Population & trend
| |
Estimate |
Data quality |
Derivation |
Year of estimate |
| No. of mature individuals |
7000-12500 |
poor |
Estimated |
1992 |
| Population trend |
Decreasing |
poor |
|
- |
| Number of subpopulations |
1 |
- |
- |
- |
| Largest subpopulation |
7000-12500 |
- |
- |
- |
| Generation length (yrs) |
15 |
- |
- |
- |
|
Population justification: An estimate of 7,000-12,500 mature individuals was extrapolated from a number of regional estimates. This equates to 10,500-18,750 individuals in total, here rounded to 10,000-20,000 individuals. |
|
Trend justification: The species has shown severe declines throughout its West African range (F. Dowsett-Lemaire in litt. 2006; J.M. Thiollay in litt. 2006) and also across southern Africa (Ferguson-Lees et al. 2001), thus its global population is estimated to be declining at a slow to moderate rate. |
Country/Territory distribution
| Country/Territory |
Occurrence status |
Extinct |
Breeding |
Non-breeding |
Passage |
| Angola |
Native |
No |
|
Yes |
|
| Benin |
Native |
No |
|
|
|
| Botswana |
Native |
No |
Yes |
|
|
| Burkina Faso |
Native |
No |
Yes |
|
|
| Burundi |
Native |
No |
|
Yes |
|
| Cameroon |
Native |
No |
|
|
|
| Côte d'Ivoire |
Native |
No |
Yes |
|
|
| Central African Republic |
Native |
No |
|
Yes |
|
| Chad |
Native |
No |
|
|
|
| Congo, The Democratic Republic of the |
Native |
No |
Yes |
|
|
| Djibouti |
Native |
No |
Yes |
|
|
| Eritrea |
Native |
No |
|
Yes |
|
| Ethiopia |
Native |
No |
Yes |
|
|
| Gabon |
Native |
No |
|
Yes |
|
| Gambia |
Native |
No |
Yes |
|
|
| Ghana |
Native |
No |
Yes |
|
|
| Guinea |
Native |
No |
|
Yes |
|
| Guinea-Bissau |
Native |
No |
|
Yes |
|
| Kenya |
Native |
No |
Yes |
|
|
| Malawi |
Native |
No |
Yes |
|
|
| Mali |
Native |
No |
Yes |
|
|
| Mauritania |
Native |
No |
Yes |
|
|
| Mozambique |
Native |
No |
|
Yes |
|
| Namibia |
Native |
No |
Yes |
|
|
| Niger |
Native |
No |
Yes |
|
|
| Nigeria |
Native |
No |
Yes |
|
|
| Rwanda |
Native |
No |
Yes |
|
|
| Senegal |
Native |
No |
Yes |
|
|
| Somalia |
Native |
No |
Yes |
|
|
| South Africa |
Native |
No |
Yes |
|
|
| South Sudan |
Native |
No |
|
|
|
| Sudan |
Native |
No |
Yes |
|
|
| Swaziland |
Native |
No |
Yes |
|
|
| Tanzania |
Native |
No |
Yes |
|
|
| Togo |
Native |
No |
|
Yes |
|
| Uganda |
Native |
No |
Yes |
|
|
| Zambia |
Native |
No |
Yes |
|
|
| Zimbabwe |
Native |
No |
Yes |
|
|
Habitats & altitude
| Habitat (level 1) |
Habitat (level 2) |
Importance |
Occurrence |
| Artificial/Terrestrial |
Pastureland |
suitable |
resident |
| Grassland |
Subtropical/Tropical Dry |
suitable |
resident |
| Savanna |
Dry |
suitable |
resident |
| Shrubland |
Subtropical/Tropical Dry |
suitable |
resident |
|
Altitude
|
0 - 4000 m
|
Occasional altitudinal limits
|
|
Threats & impact
| Threat (level 1) |
Threat (level 2) |
Impact and Stresses |
| Agriculture & Aquaculture |
Annual & perennial non-timber crops / Scale Unknown/Unrecorded |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Slow, Significant Decline |
Medium Impact: |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
| Agriculture & Aquaculture |
Livestock farming & ranching / Agro-industry grazing, ranching or farming |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Slow, Significant Decline |
Medium Impact: |
| Stresses |
|---|
| Species mortality |
|
| Agriculture & Aquaculture |
Livestock farming & ranching / Small-holder grazing, ranching or farming |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Slow, Significant Decline |
Medium Impact: |
| Stresses |
|---|
| Species mortality |
|
| Biological resource use |
Gathering terrestrial plants / Unintentional effects (species is not the target) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
|---|
| Species mortality |
|
| Biological resource use |
Hunting & trapping terrestrial animals / Intentional use (species is the target) |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Slow, Significant Decline |
Low Impact: 5 |
| Stresses |
|---|
| Reduced reproductive success, Species mortality |
|
| Human intrusions & disturbance |
Work & other activities |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Minority (<50%) |
Negligible declines |
Low Impact: 4 |
| Stresses |
|---|
| Species disturbance, Reduced reproductive success |
|
| Invasive non-native/alien species/diseases |
Problematic native species/diseases |
Timing |
Scope |
Severity |
Impact |
| Ongoing |
Majority (50-90%) |
Slow, Significant Decline |
Medium Impact: |
| Stresses |
|---|
| Ecosystem degradation, Ecosystem conversion |
|
Utilisation
| Purpose |
Primary form used |
Life stage used |
Source |
Scale |
Level |
Timing |
| Pets |
Whole |
Adults and juveniles |
Wild |
International |
Non-trivial |
Recent |
Recommended citation
BirdLife International (2013) Species factsheet: Trigonoceps occipitalis. Downloaded from
http://www.birdlife.org on 25/05/2013.
Recommended citation for factsheets for more than one species: BirdLife International (2013) IUCN Red List for birds. Downloaded from
http://www.birdlife.org on 25/05/2013.
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.
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