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The site was identified as important in 2014 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
Whooper Swan Cygnus cygnus	LC	winter	2004-2014	200-700 individuals	B1i, B3

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2014) may differ.

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2014. The most recent assessment (2019) is shown below.

State (condition of the trigger species' populations)
Species	Reference	Actual	Units	% remaining	Result
Whooper Swan Cygnus cygnus	700	1,100	individuals	100	favourable

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Natural system modifications	happening now	majority/most of area/population (50-90%)	moderate to rapid deterioration	high
Human intrusions and disturbance	happening now	majority/most of area/population (50-90%)	slow but significant deterioration	high
Invasive and other problematic species and genes	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Pollution	happening now	some of area/population (10-49%)	slow but significant deterioration	medium
Agricultural expansion and intensification	happening now	small area/few individuals (<10%)	no or imperceptible deterioration	low
Biological resource use	happening now	some of area/population (10-49%)	no or imperceptible deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Little/none of site covered (<10%)	Not assessed	Not assessed	negligible

Year	Protected Area	Designation	% overlap with IBA
1981	Seimsjøen	Naturreservat	6

Habitat1	Habitat detail	% of IBA
Wetlands (inland)	Standing freshwater	100

1. IUCN Habitat classification.

Land use	% of IBA
nature conservation and research	7

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Lake Storsjøen (Norway). Downloaded from https://datazone.birdlife.org/site/factsheet/lake-storsjøen-iba-norway on 23/11/2024.