Foulness Island of plants and invertebrates thrive there. Other birds which use the island for breeding include avocet, common tern, little tern, Sandwich tern and ringed plover. During the winter months, in excess of 100,000 waterfowl have been reported. The avocet population is the second largest in the United Kingdom. The Foulness SSSI has been designated as a Special Protection Area for Birds under the EC Birds Directive, and is also a Ramsar site under the Ramsar Convention because of its importance as a wetland. Foulness Island Foulness Island () is an island on the east coast of Essex in England, which
Foulness Island commissioners were sent to inspect the state of the banks in the Rochford hundred, which included Foulness. The earliest record of sea walls is from 1271, and in 1348 there were problems with one of the marshes, which was flooding every day, indicating that it was below the level of normal tides. The sea walls were made of earth, and were thatched with hurdles of brushwood and rushes. The island was divided into 11 or 12 marshes, each with its own wall, rather than one wall around the whole area, and was extended in 1420 by a new wall around