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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
Barnacle Goose Branta leucopsis	LC	non-breeding	2011-2015	28,985-32,080 individuals	A4i, B1i, C2
Greater White-fronted Goose Anser albifrons	LC	non-breeding	2011-2015	15,060-24,880 individuals	B1i, C3
Gadwall Mareca strepera	LC	non-breeding	2011-2015	1,147-1,627 individuals	B1i, C3

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
Agricultural expansion and intensification	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Human intrusions and disturbance	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Invasive and other problematic species and genes	happening now	majority/most of area/population (50-90%)	very rapid to severe deterioration	very high
Natural system modifications	happening now	small area/few individuals (<10%)	very rapid to severe 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	Some limited conservation initiatives are in place	medium

Year	Protected Area	Designation	% overlap with IBA
-	De Deelen	Nature Conservation Law	100
1993	Deelen	Ramsar Site, Wetland of International Importance	100
2006	Deelen	Special Protection Area (Birds Directive)	100
2010	Deelen	Natuurbeschermingswet	100

Habitat1	Habitat detail	% of IBA
Wetlands (inland)	Standing freshwater, Water fringe vegetation	90
Forest	Alluvial and very wet forest	10

1. IUCN Habitat classification.

Land use	% of IBA
water management	100
nature conservation and research	92
fisheries/aquaculture	50
tourism/recreation	20
hunting	20
agriculture	5
other	5

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