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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
Red-breasted Merganser Mergus serrator	LC	non-breeding	-	2,000 individuals	A4i, B1i, C3
Tufted Duck Aythya fuligula	LC	non-breeding	1991	10,022 individuals	B1i, C3
A4iii Species group - waterbirds	n/a	non-breeding	-	min 20,000 individuals	A4iii, C4

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
Whooper Swan Cygnus cygnus	156	156	individuals	100	favourable
Barnacle Goose Branta leucopsis	3,000	3,000	individuals	100	favourable
Spotted Crake Porzana porzana	2	2	breeding pairs	100	favourable
Great Cormorant Phalacrocorax carbo	25,000	25,000	individuals	100	favourable
Pied Avocet Recurvirostra avosetta	160	66	breeding pairs	42	unfavourable
Dunlin Calidris alpina	35	2	breeding pairs	6	very unfavourable
Wood Sandpiper Tringa glareola	250	250	individuals	100	favourable
Little Tern Sternula albifrons	21	17	breeding pairs	81	near favourable
Arctic Tern Sterna paradisaea	323	14	breeding pairs	5	very unfavourable
Short-eared Owl Asio flammeus	4	0	breeding pairs	0	very unfavourable
Western Marsh-harrier Circus aeruginosus	2	2	breeding pairs	100	favourable
Circus cyaneus	19	11	individuals	58	unfavourable
Falco peregrinus	4	4	individuals	100	favourable

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Not assessed	Not assessed	Not assessed	not assessed

Year	Protected Area	Designation	% overlap with IBA
1990	Kalvebodkilen, Vestamager	Fredet ved afgørelse, exl. Kirkeomgivelser	32
1990	Vestamager	Major Conservation Area	32
1992	Tårnby Kommune	§3 beskyttet natur (alle søer, moser, vandløb, heder, enge mv)	22
1992	Københavns Kommune	§3 beskyttet natur (alle søer, moser, vandløb, heder, enge mv)	4
1992	Dragør Kommune	§3 beskyttet natur (alle søer, moser, vandløb, heder, enge mv)	1
1998	Vestamager og havet syd for	Site of Community Importance (Habitats Directive)	100
2006	Vestamager og havet syd for	Special Protection Area (Birds Directive)	100
2009	Vestamager and the sea west of	Baltic Sea Protected Area (HELCOM)	100

Habitat1	Habitat detail	% of IBA
Shrubland	Scrub, Heathland	30
Grassland	Dry siliceous grassland, Humid grasslands	25
Artificial/Terrestrial	Forestry plantations, Other urban and industrial areas	20
Marine Coastal/Supratidal		major (>10)
Marine Intertidal		major (>10)

1. IUCN Habitat classification.

Land use	% of IBA
tourism/recreation	100
nature conservation and research	70
urban/industrial/transport	30
forestry	10

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Vestamager and adjacent sea area (Denmark). Downloaded from https://datazone.birdlife.org/site/factsheet/vestamager-and-adjacent-sea-area-iba-denmark on 22/11/2024.