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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') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
Lesser Black-backed Gull Larus fuscus	LC	breeding	1994	775 breeding pairs	B3
Great Black-backed Gull Larus marinus	LC	breeding	1994	240 breeding pairs	B3
Common Tern Sterna hirundo	LC	breeding	1994	175 breeding pairs	C6
Sandwich Tern Thalasseus sandvicensis	LC	breeding	1994	1,356 breeding pairs	A4i, B1i, B2, C6
Black Guillemot Cepphus grylle	LC	breeding	1994	490 breeding pairs	B1ii

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2000) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2000. The most recent assessment (2010) is shown below.

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Pied Avocet Recurvirostra avosetta	1	1	breeding pairs	100	favourable
Black Guillemot Cepphus grylle	1,900	1,900	individuals	100	favourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Other	happening now	majority/most of area/population (50-90%)	very rapid to severe deterioration	very high
Residential and commercial development	happening now	whole area/population (>90%)	very rapid to severe deterioration	very high
Invasive and other problematic species and genes	happening now	some of area/population (10-49%)	slow but significant deterioration	medium

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	No management plan exists but the management planning process has begun	Substantive conservation measures are being implemented but these are not comprehensive and are limited by resources and capacity	medium

Year	Protected Area	Designation	% overlap with IBA
1977	Hirsholmene	Ramsar Site, Wetland of International Importance	100
1981	Waters around Hirsholmene	Major Conservation Area	100
1983	Hirsholmene	Special Protection Area (Birds Directive)	100
1992	Frederikshavn Kommune	§3 beskyttet natur (alle søer, moser, vandløb, heder, enge mv)	2
1994	Hirsholmene	Baltic Sea Protected Area (Helcom)	100
1998	Hirsholmene; havet vest herfor og Ellinge Å's udløb	Site of Community Importance (Habitats Directive)	100
2005	Waters around Hirsholmene	Baltic Sea Protected Area (HELCOM)	100
2009	Hirsholmene, havet vest herfor og Ellinge Å’s udløb	Marine Protected Area (OSPAR)	93

Habitat1	Habitat detail	% of IBA
Marine Intertidal		100

1. IUCN Habitat classification.

Land use	% of IBA
nature conservation and research	100

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Hirsholmene (Denmark). Downloaded from https://datazone.birdlife.org/site/factsheet/hirsholmene-iba-denmark on 23/11/2024.