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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
Tufted Duck Aythya fuligula	LC	non-breeding	1995	150 individuals	B1i, C3

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
Goosander Mergus merganser	150	118	individuals	79	near favourable
Black-headed Gull Larus ridibundus	2,800	2,800	individuals	100	favourable
Mew Gull Larus canus	5,940	5,940	individuals	100	favourable
Common Kingfisher Alcedo atthis	1	1	breeding pairs	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
1947	Vaserne	Fredet ved afgørelse, exl. Kirkeomgivelser	7
1947	Furesø, Vaserne	Fredet ved afgørelse, exl. Kirkeomgivelser	<1
1948	Bastrup Sø Farum Sø, Mølleådalen	Fredet ved afgørelse, exl. Kirkeomgivelser	1
1974	Værløse, skov- og sønære arealer,	Fredet ved afgørelse, exl. Kirkeomgivelser	1
1992	Furesø Kommune	§3 beskyttet natur (alle søer, moser, vandløb, heder, enge mv)	42
1992	Rudersdal Kommune	§3 beskyttet natur (alle søer, moser, vandløb, heder, enge mv)	26
1992	Lyngby-Taarbæk Kommune	§3 beskyttet natur (alle søer, moser, vandløb, heder, enge mv)	20
1998	Øvre Mølleådal; Furesø og Frederiksdal Skov	Site of Community Importance (Habitats Directive)	100
2006	Furesø med Vaserne og Farum Sø	Special Protection Area (Birds Directive)	100
2009	Storebjerg, Farum Naturpark	Fredet ved afgørelse, exl. Kirkeomgivelser	<1

Habitat1	Habitat detail	% of IBA
Wetlands (inland)	Standing freshwater	75
Unknown		25
Forest		5
Grassland	Humid grasslands	-

1. IUCN Habitat classification.

Land use	% of IBA
unknown	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Furesø and Farum Sø (Denmark). Downloaded from https://datazone.birdlife.org/site/factsheet/furesø-and-farum-sø-iba-denmark on 22/11/2024.