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The site was identified as internationally important for bird conservation in 2014 because it was regularly supporting significant populations of the species listed below, meeting IBA criteria.

Populations meeting IBA criteria ('key species') at the site:

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Long-tailed Duck Clangula hyemalis	VU	winter (2008–2013)	1,000–4,000 individuals	A1
Goosander Mergus merganser	LC	non-breeding (2010–2013)	21,000 individuals	A4i, B1i
Red-breasted Merganser Mergus serrator	LC	non-breeding (2010–2014)	1,000–2,000 individuals	B1i
A4iii Species group - waterbirds	n/a	non-breeding (2010–2014)	22,000–23,000 individuals	A4iii

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2014. The most recent assessment (2016) is shown below.

State (condition of the key species' populations)
Species	Actual vs Reference (units)	% remaining	Result
Long-tailed Duck Clangula hyemalis	6,000 / 4,000 (individuals)	100	favourable
Common Eider Somateria mollissima	5,000 / 1,000 (individuals)	100	favourable
Goosander Mergus merganser	25,000 / 21,000 (individuals)	100	favourable
Red-breasted Merganser Mergus serrator	4,000 / 2,000 (individuals)	100	favourable

State (condition of the key species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Grassland	good (>90%)	good (>90%)	favourable
Marine Neritic	good (>90%)	good (>90%)	favourable
Marine Intertidal	good (>90%)	good (>90%)	favourable

Pressure (threats to the key species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Transportation and service corridors	likely in short term (within 4 years)	whole popul­ation/area (>90%)	rapid deteri­oration (>30% over 3 gener­ations)	very high
Invasive and other problematic species and genes	happen­ing now	most of popul­ation/area (50–90%)	slow deteri­oration (1–10% over 3 gener­ations)	high
Biological resource use	happen­ing now	some of popul­ation/area (10–49%)	moderate deteri­oration (10–30% in 3 gener­ations)	high
Human intrusions and disturbance	happen­ing now	some of popul­ation/area (10–49%)	slow deteri­oration (1–10% over 3 gener­ations)	medium
Residential and commercial development	likely in long term (beyond 4 years)	some of popul­ation/area (10–49%)	slow deteri­oration (1–10% over 3 gener­ations)	medium
Energy production and mining	likely in long term (beyond 4 years)	some of popul­ation/area (10–49%)	slow deteri­oration (1–10% over 3 gener­ations)	medium
Pollution	happen­ing now	some of popul­ation/area (10–49%)	no deteri­oration (<1% over 3 gener­ations)	low
Agricultural expansion and intensification	happen­ing now	few individ­uals/small area (<10%)	no deteri­oration (<1% over 3 gener­ations)	low

Response (conservation actions taken for the key species and/or their habitats)
Designation	Planning	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	The conservation measures needed for the site are being comprehensively and effectively implemented	high

Year	Protected Area	Designation (management category)	% coverage of IBA
1991	Tanamunningen	Naturreservat (Ia)	91

Habitat	% of IBA	Habitat detail
Grassland	5	Alpine, subalpine and boreal grassland
Marine Intertidal	major (>10)
Marine Neritic	major (>10)
Marine Coastal/Supratidal	-

Land use	% of IBA
hunting	-

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Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Tanamunningen (Norway). Downloaded from https://datazone.birdlife.org/site/factsheet/tanamunningen-iba-norway on 13/01/2025.