• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

The site was identified as important in 2000 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
Pied Avocet Recurvirostra avosetta	LC	non-breeding	1988	1,500 individuals	A4i, B1i, C2
Black-tailed Godwit Limosa limosa	NT	non-breeding	1985-1986	9,000 individuals	A4i, B1i, C3
Ruff Calidris pugnax	LC	breeding	1988-1991	13 breeding pairs	C6
Ruff Calidris pugnax	LC	non-breeding	1986	7,000 individuals	C6
Common Tern Sterna hirundo	LC	breeding	1987-1991	1,680 breeding pairs	C2, C6
A4iii Species group - waterbirds	n/a	unknown	-	20,000 individuals	A4iii, C4

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2000).

Protected area (PA)	PA designation	PA area (ha)	Relationship of PA with IBA	Overlap of PA with IBA (ha)
Workumerwaard	Ramsar Site, Wetland of International Importance	0	protected area overlaps with site	0
Friese IJsselmeerkust II	Natural Monument	120	protected area overlaps with site	2
Friese IJsselmeerkust I	Natural Monument	4,800	protected area overlaps with site	550

Habitat (IUCN level 1)	Habitat detail	Extent (% of site)
Wetlands (inland)	Standing freshwater	-
Artificial/Terrestrial	Highly improved re-seeded landscapes	-

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

Land-use	Extent (% of site)
agriculture	-
other	-
fisheries/aquaculture	-
water management	-
nature conservation and research	-
tourism/recreation	-

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Workumerwaard. Downloaded from http://datazone.birdlife.org/site/factsheet/workumerwaard-iba-netherlands on 01/10/2023.