MA010
Merja Zerga


IBA Criteria

Year of most recent IBA criteria assessment: 2001

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Common Shelduck Tadorna tadorna LC winter - 4,700 individuals A4i
Ruddy Shelduck Tadorna ferruginea LC winter - 250 individuals A4i
Marbled Teal Marmaronetta angustirostris VU winter - 30 individuals A1, A4i
Northern Shoveler Spatula clypeata LC winter - 10,960 individuals A4i
Gadwall Mareca strepera LC winter - 1,350 individuals A4i
Eurasian Wigeon Mareca penelope LC winter - 26,000 individuals A4i
Phoenicopterus ruber NR winter - 1,080 individuals A4i
Red-knobbed Coot Fulica cristata LC winter - 67 individuals A4i
Common Coot Fulica atra LC winter - 45,460 individuals A4i
Pied Avocet Recurvirostra avosetta LC winter - 6,945 individuals A4i
Grey Plover Pluvialis squatarola LC winter - 5,260 individuals A4i
Slender-billed Curlew Numenius tenuirostris CR winter 2000 present A1
A4iii Species group - waterbirds n/a winter - 100,000-499,999 individuals A4iii

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here


IBA Monitoring

Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2001 high not assessed not assessed
Was the whole site covered? Yes State assessed by unset
Accuracy of information good

Threats to the site (pressure)
Threat Level 1 Threat Level 2 Timing Scope Severity Result
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 hunting & collecting terrestrial animals - intentional use (species being assessed is the target) happening now some of area/population (10-49%) slow but significant deterioration medium
Human intrusions and disturbance recreational activities happening now majority/most of area/population (50-90%) slow but significant deterioration high
Natural system modifications dams & water management/use - abstraction of ground water (agricultural use) happening now majority/most of area/population (50-90%) moderate to rapid deterioration high
Pollution agricultural & forestry effluents - herbicides and pesticides happening now majority/most of area/population (50-90%) slow but significant deterioration high
Pollution agricultural & forestry effluents - nutrient loads happening now majority/most of area/population (50-90%) slow but significant deterioration high

Conservation actions taken at site (response)
Conservation Designation Management Planning Conservation Action Result
Not assessed Not assessed Not assessed not assessed
For more information about IBA monitoring please click here

IBA Protection

Protection status:

Protected Area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)
Merja Zerga Nature Reserve 6,815 is identical to site 7,300
Merja Zerga Ramsar Site, Wetland of International Importance 7,300 protected area overlaps with site 0
Merja Zerga Réserve Biologique Permanente 7,000 protected area overlaps with site 7,000

Land use

Land-use Extent (% of site)
agriculture -
fisheries/aquaculture -
hunting -
nature conservation and research -
tourism/recreation -
urban/industrial/transport -
other -
For further information about the land use classification please click here.


Recommended citation
BirdLife International (2020) Important Bird Areas factsheet: Merja Zerga. Downloaded from http://www.birdlife.org on 29/11/2020.