The following adapted from the RSPB website
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"The reserve covers more than 740ha, with all of the arable farmland now transformed to saltmarsh, mudflats, lagoons and grazing marsh.
There are six walking trails – Jubilee Marsh, Allfleets Marsh, Marsh Flats, South Trail, New Pool Trail and Beagle Trail, making over 15km of trail on the reserve. At the ends of Allfleets Marsh trail and Jubilee Marsh trail are two shelters providing a comfortable place to sit overlooking the river.
To create this magical landscape of marshland, lagoons, ditches and sea, more than three million tonnes of earth was brought by boat from the tunnels and shafts created by the Crossrail scheme in London. This allowed us to raise the land above sea level and place the soil in a way that created a new 115-hectare intertidal area of saltmarsh, islands and mudflats (known as Jubilee Marsh).
In addition, Crossrail helped us create saline lagoons, a creek network and grazing marsh. All of which means Wallasea Island is now a wildlife-rich habitat and a great place to visit.
Wallasea Island sits within a Special Protection Area which covers the Crouch and Roach estuaries, and which is special for overwintering waders and wildfowl including Brent Geese. Our work here increases the habitat for these birds both whilst roosting and feeding, as well as creating new grassland areas (wet and dry). The intertidal areas have been designed with climate change in mind, with long shallow slopes from the new seawall providing space for the saltmarsh to creep up as sea levels rise."
See other images of RSPB Wallasea Island