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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') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
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

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2001) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2001. The most recent assessment (2001) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Grassland	good (> 90%)	poor (40-69%)	unfavourable
Wetlands (inland)	good (> 90%)	good (> 90%)	favourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Agricultural expansion and intensification	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Biological resource use	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 areas	Management plan	Other 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

Year	Protected Area	Designation	% overlap with IBA
1970	Sahel	Partial Faunal Reserve	100
1990	La Mare d’Oursi	Ramsar Site, Wetland of International Importance	100

The Local Conservation Group(s) listed below are working to conserve this IBA.

Name	Year formed
Oursi Site Support Group	1998

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

Habitat1	Habitat detail	% of IBA
Grassland		94
Artificial/Terrestrial		5
Wetlands (inland)	Freshwater lakes and pools	minor (<10)

1. IUCN Habitat classification.

Land use	% of IBA
rangeland/pastureland	major (>10)
agriculture	-
fisheries/aquaculture	-
nature conservation and research	-
other	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Lake Oursi - Lake Darkoye (Burkina Faso). Downloaded from https://datazone.birdlife.org/site/factsheet/lake-oursi--lake-darkoye-iba-burkina-faso on 23/11/2024.