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Our work here
Marazion Marsh protects the largest reedbed in Cornwall, together with other wetland features, willow scrub and grassland. It is an important wintering site for bitterns and a regular stopover for the globally threatened aquatic warbler. Other wetland birds include grey herons, waterfowl and warblers.
The RSPB is managing the reserve for its wildlife, and to produce a more mature wetland ecosystem. We are also developing the reserve for visitors and to benefit the local economy.
Reedbed renovations
We aim to increase the number of wintering bitterns, and encourage at least one pair to breed, by extending the Phragmites reedbed – keeping 80% flooded and leaving the rest as dry reedbed.
We will also maintain open water by cutting back encroaching reeds, and will build up populations of fish and aquatic invertebrates. This work will benefit all breeding and wintering water birds. We will use ringing to count passage aquatic warblers and spotted crakes. We will also encourage scarce plants and otters, while eradicating mink, rats and alien plants.
Other habitats
We will work to maintain the willow scrub and nearby woodland for key birds and invertebrates, including Cetti’s warblers. New research will provide population data for other key fauna and flora. Work will include controlling scrub by treating stumps and removing seedlings.
We will also maintain 3 ha of unimproved grassland for key species, including stonechats, by controlling scrub encroachment and mowing for optimum sward height.
Monitoring
We will inform our management of the site through research and monitoring. Key subjects will include wintering bitterns and wildfowl, passage aquatic warblers and spotted crakes, and breeding wetland birds.
We will also monitor other wildlife, including eels, dragonflies and otters, plus water quality and sward structure. Aerial photography will help us assess all habitats.
People
We expect visitor numbers to double over the next 25 years. We aim to provide an excellent wildlife experience for locals and visitors alike. The reserve will become an asset to the local economy and community, enhancing the profile of the RSPB.