• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

The site was identified as internationally important for bird conservation in 2007 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
Eurasian Bittern Botaurus stellaris	LC	breeding (1994–1999)	2 males	C6
Aquatic Warbler Acrocephalus paludicola	VU	passage (1994–1998)	6 birds	C6
Aquatic Warbler Acrocephalus paludicola	VU	passage (2001–2006)	1 birds	C6

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2007. The most recent assessment (2007) is shown below.

State (condition of the trigger species' populations)
Species	Actual vs Reference (units)	% remaining	Result
Eurasian Bittern Botaurus stellaris	0 / 2 (pairs)	0	very poor
Aquatic Warbler Acrocephalus paludicola	1 / 6 (birds)	17	very poor

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
No known threats	happe­ning now	few indivi­duals/small area (<10%)	no or slight decline (<1% over 3 gener­ations)	low

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

Year	Protected Area	Designation (management category)	% coverage of IBA
-	Marazion Marsh	RSPB Reserve (-)	100
1985	Marazion Marsh	Site of Special Scientific Interest (UK) (IV)	100
1990	Marazion Marsh	Nature Reserve (IV)	53

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

Land use	% of IBA
nature conservation and research	major (>10)

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Marazion Marsh (United Kingdom). Downloaded from https://datazone.birdlife.org/site/factsheet/marazion-marsh-iba-united-kingdom on 24/12/2024.