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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 ('triggering') IBA criteria.

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

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Mute Swan Cygnus olor	LC	non-breeding (1994)	13,097 birds	A4i, B1i, C3
Red-breasted Merganser Mergus serrator	LC	winter (1993)	6,500 birds	A4i, B1i, C3
Tufted Duck Aythya fuligula	LC	non-breeding (1989)	22,000 birds	A4i, B1i, C3
Red-necked Grebe Podiceps grisegena	LC	winter (1993)	200 birds	B1i, C3
Red-throated Loon Gavia stellata	LC	winter (1988)	250-999 birds	A4i, B1i, C2
Arctic Loon Gavia arctica	LC	winter (1988)	250-999 birds	A4i, B1i, C2
Great Cormorant Phalacrocorax carbo	LC	non-breeding (1989)	2,815 birds	B1i, C3
Black Guillemot Cepphus grylle	LC	winter (1993)	700 birds	B1ii
A4iii Species group - waterbirds	n/a	unknown (-)	20,000-49,999 birds	A4iii, C4

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	Actual vs Reference (units)	% remaining	Result
Greylag Goose Anser anser	3,000 / 3,000 (birds)	100	good
Common Goldeneye Bucephala clangula	18,000 / 18,000 (birds)	100	good
Smew Mergellus albellus	200 / 200 (birds)	100	good
Red-backed Shrike Lanius collurio	8 / 8 (pairs)	100	good

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Not assessed	Not assessed	Not assessed	not assessed

Year	Protected Area	Designation (management category)	% coverage of IBA
-	Rodsand Bird/Game	Reserve (-)	-
1929	Frejlev Bøget	Fredet ved afgørelse, exl. Kirkeomgivelser (V)	<1
1989	Saksfjed Inddæmning, Hyllekrog	Fredet ved afgørelse, exl. Kirkeomgivelser (IV)	2
1992	Guldborgsund Kommune	§3 beskyttet natur (alle søer, moser, vandløb, heder, enge mv) (IV)	<1
1994	Hyllekrog-Rødsand and Fehmarn Belt	Baltic Sea Protected Area (Helcom) (UA)	99

Habitat	% of IBA	Habitat detail
Marine Neritic	95
Marine Coastal/Supratidal	minor (<10)
Marine Intertidal	minor (<10)

Land use	% of IBA
unknown	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Hyllekrog-Rødsand and Fehmarn Belt (Denmark). Downloaded from https://datazone.birdlife.org/site/factsheet/hyllekrog-rødsand-and-fehmarn-belt-iba-denmark on 23/12/2024.