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The site was identified as internationally important for bird conservation in 2000 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
Common Eider Somateria mollissima	NT	non-breeding (-)	80,000 individuals	A4i, B1i
Red Knot Calidris canutus	NT	passage (1990)	12,000 individuals	A4i, B1i
A4iii Species group - waterbirds	n/a	non-breeding (-)	50,000-99,999 individuals	A4iii

Year	Protected Area	Designation (management category)	% coverage of IBA
1974	Eldborg i Hnappadal	Natturuvaetti Monument (III)	<1

Habitat	% of IBA	Habitat detail
Marine Neritic	40
Marine Coastal/Supratidal	major (>10)
Marine Intertidal	major (>10)

Land use	% of IBA
agriculture	-
other	-

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Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Longufjorur (Iceland). Downloaded from https://datazone.birdlife.org/site/factsheet/longufjorur-iba-iceland on 18/01/2025.