Taxonomic note
Formerly considered conspecific with B. regulorum (lumped species sometimes erroneously listed as B. regulorum), but differences revealed by electrophoresis, together with those in vocalizations, bare parts and plumage, as well as in genetic evidence (Krajewski & King 1996, Krajewski et al. 2010), advocate recognition of two species. Two subspecies recognized.
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.
Critically Endangered | Endangered | Vulnerable |
---|---|---|
- | - | A2bcd |
Year | Category | Criteria |
---|---|---|
2024 | Vulnerable | A2bcd |
2016 | Vulnerable | A4bcd |
2012 | Vulnerable | A4bcd |
2010 | Vulnerable | A4b,c,d |
2008 | Near Threatened | A2b,c,d,e; A3b,c,d,e; A4b,c,d,e |
2006 | Near Threatened | |
2004 | Near Threatened | |
2000 | Lower Risk/Near Threatened | |
1994 | Lower Risk/Least Concern | |
1988 | Lower Risk/Least Concern |
Migratory status | not a migrant | Forest dependency | does not normally occur in forest |
Land-mass type |
continent |
Average mass | - |
Estimate | Data quality | |
---|---|---|
Extent of Occurrence (breeding/resident) | 6,510,000 km2 | medium |
Severely fragmented? | no | - |
Estimate | Data quality | Derivation | Year of estimate | |
---|---|---|---|---|
Population size | 44000-74000 mature individuals | medium | suspected | 2024 |
Population trend | decreasing | medium | suspected | - |
Rate of change over the past 10 years/3 generations (longer of the two periods) | 6-31% | - | - | - |
Generation length | 12.09 years | - | - | - |
Number of subpopulations | 2 | - | - | - |
Percentage of mature individuals in largest subpopulation | 1-89% | - | - | - |
Population justification: The western sub-population (B. p. pavonina) is thought to number 20,000 to 25,000 individuals in Chad alone (Defos Du Rau et al. in prep. 2024) following the survey of new sites in the south and east of the country (Beilfuss 2019). All other country estimates for this subpopulation date to 2004, with an additional total of approximately 9,400 individuals (Beilfuss et al. 2005). The previous total estimate for this subspecies was approximately 15,000 in 2004 (Beilfuss et al. 2005), but the recently recorded birds are thought to be in addition to previous estimates and probably do not represent redistribution, as this area had simply not been surveyed before.
The eastern subpopulation (B. p. ceciliae) was estimated at 28,000-55,000 individuals in 2004 (Beilfuss et al. 2007), but remains dominated by the large count of 36,823 individuals derived from aerial surveys of the Sudd, South Sudan (Mefit-Babtie 1983). Recent investigations into the population present in Gambella, south-west Ethiopia (and close to the Sudd) reveal a large dry season population of 9,138 to 19,849 individuals (Aticho et al. 2024). More recent surveys of the population size at Lake Tana in Ethiopia in 2015-2016 estimate the population size in that region at approximately 2,100 to 2,600 individuals, in wet and dry seasons, respectively (Zelelew et al. 2020). The previous estimate for this site was 1,500-2,000.
This gives a total suspected population size of 66,000-111,000 individuals, roughly equivalent to 44,000-74,000 mature individuals.
Trend justification: This long-lived species suffered a rapid population reduction due to drought and associated habitat loss and increased pressure from people across the range, including trapping for trade (Fry 1987, Williams et al. 2003, Beilfus et al. 2007, Kone et al. 2007, Morrison 2019, Archibald et al. 2020). Rapid losses occurred throughout northern Nigeria, prior to the 1990s (Fry 1987, Meine and Archibald 1996) where it was previously 'plentifully distributed north of 10 degrees latitude' (Walkenshaw 1964) and considered to hold a large population (Morrison 2009). In Mali the population was estimated at 7,000-8,000 in 1985 (Urban 1988) but fell very rapidly to 600 by 2000/2001 (Williams et al. 2003) and has continued to decline to below 500 individuals (Beilfuss et al. 2007), while in Burkina Faso where 1,400-1,500 in the 1970s fell to approximately 50 by 2004 (Beilfuss et al. 2007). In Ghana it was previously not uncommon (Grimes 1987) but was noted to be declining very rapidly (Tréca 1996) while by 2001 there were thought fewer than 50 and declining (Williams et al. 2003). While these very rapid reductions in the western part of the range appear to have stabilised by the mid-1990s (Archibald and Meine 1996, Williams et al. 2003, Archibald et al. 2020), threats have not ceased and there is particular uncertainty over current trends due to the limited recent data from the Sudd swamp in South Sudan (Beilfuss et al. 2007). The single largest count of 36,823 was made at this site, which formed the bulk of a previous population estimate of 50,000–70,000 for the eastern subpopulation (Beilfuss et al. 2007) and creates large uncertainty in population and trend estimates. Despite large numbers being newly documented at Gambella in western Ethiopia (9,138–19,849 in the dry season) (Aticho et al. 2024) the trend of this subpopulation remains highly uncertain until large-scale monitoring can be carried out. New investigations have located large concentrations previously unrecorded in south eastern Chad (Beilfuss 2019) and documented the occurrence of large numbers at Gambella in south-west Ethiopia (Aticho et al. 2024), neither of which are likely to have been included in previous published population estimates.
With the very long three-generation length for the species, 36 years, still reaching back into the period of rapid reductions due to drought and habitat changes in the 1980s, a precautionary range of the past rate of population reduction since 1988 is -31.3% to -6%, based on revised 1985 population sizes in Beilfuss et al. (2007) (see population size section) compared with updated values based on the 2004 data (Beilfuss et al. 2007) and including the same additional and updated values.
Black Crowned Crane still faces several ongoing threats, including some with high impact such as habitat loss and degradation, hunting, poaching and trapping, and disturbance, and emerging threats such as the development of energy infrastructure (Diop 2015, Diagana and Diawara 2015, Lecoq et al. 2015, Diagana 2016). While the discovery of large numbers of Black Crowned Cranes at new sites is encouraging, they do not appear to relate to increases in the total population. Hence, while the rapid reductions seen in the past appear to have slowed, it is plausible that there is still a slow ongoing reduction in the population.
Country/Territory | Presence | Origin | Resident | Breeding visitor | Non-breeding visitor | Passage migrant |
---|---|---|---|---|---|---|
Benin | extant | vagrant | yes | |||
Burkina Faso | extant | vagrant | yes | |||
Cameroon | extant | native | yes | |||
Central African Republic | extant | vagrant | yes | |||
Chad | extant | native | yes | |||
Congo, The Democratic Republic of the | possibly extant | native | yes | |||
Côte d'Ivoire | extant | vagrant | ||||
Egypt | extant | vagrant | ||||
Eritrea | extant | vagrant | ||||
Ethiopia | extant | native | yes | |||
Gambia | extant | native | yes | |||
Ghana | extant | native | yes | |||
Guinea | extant | native | yes | |||
Guinea-Bissau | extant | native | yes | |||
Kenya | extant | native | yes | |||
Mali | extant | native | yes | |||
Mauritania | extant | native | yes | |||
Niger | extant | native | yes | |||
Nigeria | possibly extinct | native | yes | |||
Senegal | extant | native | yes | |||
Sierra Leone | extant | vagrant | ||||
South Sudan | extant | native | yes | |||
Sudan | extant | native | yes | |||
Togo | extant | vagrant | ||||
Uganda | extant | native | yes |
Country/Territory | IBA Name |
---|---|
Cameroon | Logone flood-plain |
Cameroon | Waza National Park |
Chad | Lake Fitri |
Chad | Zakouma National Park |
Mauritania | Diawling National Park |
Mauritania | Gâat Mahmoûdé |
Nigeria | Chad Basin National Park: Chingurmi - Duguma Sector |
Senegal | Djoudj wetlands |
South Sudan | Lake Abiad (South Sudan) |
South Sudan | Sudd (Bahr-el-Jebel system) |
Sudan | Lake Abiad (Sudan) |
Sudan | Lake Kundi |
Habitat (level 1) | Habitat (level 2) | Importance | Occurrence |
---|---|---|---|
Artificial/Aquatic & Marine | Artificial/Aquatic - Irrigated Land (includes irrigation channels) | suitable | resident |
Artificial/Aquatic & Marine | Artificial/Aquatic - Seasonally Flooded Agricultural Land | suitable | resident |
Artificial/Aquatic & Marine | Artificial/Aquatic - Water Storage Areas (over 8ha) | suitable | resident |
Artificial/Terrestrial | Arable Land | suitable | resident |
Artificial/Terrestrial | Pastureland | suitable | non-breeding |
Grassland | Subtropical/Tropical Dry | suitable | non-breeding |
Grassland | Subtropical/Tropical High Altitude | suitable | non-breeding |
Grassland | Subtropical/Tropical Seasonally Wet/Flooded | major | resident |
Marine Coastal/Supratidal | Coastal Freshwater Lakes | suitable | resident |
Savanna | Dry | suitable | resident |
Wetlands (inland) | Bogs, Marshes, Swamps, Fens, Peatlands | suitable | resident |
Wetlands (inland) | Permanent Freshwater Lakes (over 8ha) | suitable | resident |
Wetlands (inland) | Permanent Freshwater Marshes/Pools (under 8ha) | suitable | breeding |
Wetlands (inland) | Permanent Inland Deltas | major | resident |
Wetlands (inland) | Permanent Rivers/Streams/Creeks (includes waterfalls) | suitable | resident |
Wetlands (inland) | Seasonal/Intermittent Freshwater Lakes (over 8ha) | suitable | resident |
Wetlands (inland) | Seasonal/Intermittent Freshwater Marshes/Pools (under 8ha) | suitable | breeding |
Altitude | 0 - 3000 m | Occasional altitudinal limits |
Threat (level 1) | Threat (level 2) | Impact and Stresses | |||||||
---|---|---|---|---|---|---|---|---|---|
Agriculture & aquaculture | Annual & perennial non-timber crops - Agro-industry farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Agriculture & aquaculture | Annual & perennial non-timber crops - Small-holder farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
Agriculture & aquaculture | Livestock farming & ranching - Small-holder grazing, ranching or farming | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
Biological resource use | Hunting & trapping terrestrial animals - Intentional use (species is the target) | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
Biological resource use | Hunting & trapping terrestrial animals - Persecution/control | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Negligible declines | Low Impact: 4 | ||||||
|
|||||||||
Climate change & severe weather | Droughts | Timing | Scope | Severity | Impact | ||||
Ongoing | Majority (50-90%) | Slow, Significant Declines | Medium Impact: 6 | ||||||
|
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Energy production & mining | Oil & gas drilling | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Unknown | Unknown | ||||||
|
|||||||||
Human intrusions & disturbance | War, civil unrest & military exercises | Timing | Scope | Severity | Impact | ||||
Ongoing | Unknown | Unknown | Unknown | ||||||
|
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Natural system modifications | Dams & water management/use - Abstraction of surface water (unknown use) | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
Natural system modifications | Dams & water management/use - Dams (size unknown) | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
|||||||||
Natural system modifications | Fire & fire suppression - Increase in fire frequency/intensity | Timing | Scope | Severity | Impact | ||||
Ongoing | Unknown | Unknown | Unknown | ||||||
|
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Pollution | Agricultural & forestry effluents - Herbicides and pesticides | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
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Pollution | Industrial & military effluents - Type Unknown/Unrecorded | Timing | Scope | Severity | Impact | ||||
Ongoing | Minority (<50%) | Slow, Significant Declines | Low Impact: 5 | ||||||
|
Purpose | Scale |
---|---|
Food - human | subsistence, national |
Pets/display animals, horticulture | national, international |
Wearing apparel, accessories | national |
Recommended citation
BirdLife International (2024) Species factsheet: Black Crowned Crane Balearica pavonina. Downloaded from
https://datazone.birdlife.org/species/factsheet/black-crowned-crane-balearica-pavonina on 26/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from
https://datazone.birdlife.org/species/search on 26/12/2024.