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The site was identified as important in 2001 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):

Species	Current IUCN Red List Category	Season	Year(s)	Population estimate at site	IBA criteria met
Little Grebe Tachybaptus ruficollis	LC	non-breeding	1998	500 individuals	A4i
African Collared-dove Streptopelia roseogrisea	LC	resident	1998	present	A3
Purple Swamphen Porphyrio porphyrio	LC	non-breeding	1998	647 individuals	A4i
Black-winged Stilt Himantopus himantopus	LC	non-breeding	1998	1,713 individuals	A4i
Cricket Warbler Spiloptila clamans	LC	resident	1998	present	A3
Chestnut-bellied Starling Lamprotornis pulcher	LC	resident	1998	present	A3
Black Scrub-robin Cercotrichas podobe	LC	resident	1998	present	A3
Sudan Golden Sparrow Passer luteus	LC	resident	1998	present	A3
A4iii Species group - waterbirds	n/a	non-breeding	1998	min 20,000 individuals	A4iii

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2001).

State (condition of the trigger species' habitats)
Habitat	Habitat detail	Reference area (ha)	Actual area (ha)	Habitat quantity (% remaining)	Habitat quality (carrying capacity)	Result
Grassland		0	0	good (> 90%)	poor (40-69%)	unfavourable
Wetlands (inland)	Freshwater lakes and pools	0	0	good (> 90%)	good (> 90%)	favourable

Pressure (threats to the trigger species and/or their habitats)
Threat level 1	Threat level 2	Timing	Scope	Severity	Result
Agricultural expansion and intensification	annual & perennial non-timber crops - small-holder farming	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Agricultural expansion and intensification	livestock farming and ranching (includes forest grazing) - small-holder grazing, ranching or farming	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Biological resource use	fishing & harvesting aquatic resources - unintentional effects: subsistence/small scale	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Biological resource use	gathering terrestrial plants - unintentional effects (species being assessed is not the target)	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Biological resource use	hunting & collecting terrestrial animals - intentional use (species being assessed is the target)	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high

Response (conservation actions taken for the trigger species and/or their habitats)
Protected-area designation	Management planning	Other conservation action	Result
Most of site (50-90%) covered (including the most critical parts for important bird species)	No management plan exists but the management planning process has begun	Some limited conservation initiatives are in place	low

For more information about IBA conservation status, please click here

Protected area (PA)	PA designation	PA area (ha)	Relationship of PA with IBA	Overlap of PA with IBA (ha)
Sahel	Partial Faunal Reserve	1,600,000	protected area contains site	45,000
La Mare d’Oursi	Ramsar Site, Wetland of International Importance	45,000	protected area overlaps with site	45,000

The Local Conservation Groups listed below are working to support conservation at this IBA.

Name	Year formed
Oursi Site Support Group	1998

For more information on BirdLife's work with Local Conservation Groups, please click here.

Habitat (IUCN level 1)	Habitat detail	Extent (% of site)
Artificial/Terrestrial		-
Grassland		-
Wetlands (inland)	Freshwater lakes and pools	-

For more information about the IUCN Habitat classification, please click here.

Land-use	Extent (% of site)
agriculture	-
fisheries/aquaculture	-
nature conservation and research	-
other	-
rangeland/pastureland	-

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Lake Oursi - Lake Darkoye. Downloaded from http://datazone.birdlife.org/site/factsheet/lake-oursi--lake-darkoye-iba-burkina-faso on 30/09/2023.