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The site was identified as important in 2016 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
Gadwall Mareca strepera	LC	non-breeding	2011-2015	1,617-2,310 individuals	B1i, C3
Eurasian Spoonbill Platalea leucorodia	LC	breeding	2011-2015	69-104 breeding pairs	B1i
Little Egret Egretta garzetta	LC	breeding	2011-2015	2-6 breeding pairs	C6

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2016) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2016. The most recent assessment (2018) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Pollution	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Climate change and severe weather	happening now	whole area/population (>90%)	moderate to rapid deterioration	very high
Energy production and mining	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Human intrusions and disturbance	likely in short term (within 4 years)	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Residential and commercial development	likely in short term (within 4 years)	some of area/population (10-49%)	moderate to rapid deterioration	medium
Agricultural expansion and intensification	happening now	small area/few individuals (<10%)	no or imperceptible deterioration	low
Transportation and service corridors	happening now	small area/few individuals (<10%)	no or imperceptible deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Whole area of site (>90%) covered by appropriate conservation designation	A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity	high

Year	Protected Area	Designation	% overlap with IBA
-	Esscheplaat	Nature Conservation Law	2
1971	Hoogezandse Gorzen	Natural Monument	1
1981	Esscheplaat, Zeehondenplaat en Sasseplaat II	Natural Monument	1
1981	Oosterse Slobbegorzen	Natural Monument	1
1981	Esscheplaat, Zeehondenplaat en Sasseplaat	Natural Monument	6
1998	Hollands Diep	Special Protection Area (Birds Directive)	100
2000	Hollands Diep	Ramsar Site, Wetland of International Importance	98
2002	Hollands Diep	Site of Community Importance (Habitats Directive)	8
2003	Hollands Diep	Natuurbeschermingswet	100

Habitat1	Habitat detail	% of IBA
Wetlands (inland)	Standing freshwater	90
Artificial/Terrestrial	Highly improved re-seeded landscapes	10

1. IUCN Habitat classification.

Land use	% of IBA
water management	100
tourism/recreation	90
fisheries/aquaculture	80
hunting	30
urban/industrial/transport	10
nature conservation and research	8
agriculture	5

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Hollands Diep (Netherlands). Downloaded from https://datazone.birdlife.org/site/factsheet/hollands-diep-iba-netherlands on 23/11/2024.