The landscape here was formed by wind-blown sand ridges that were cut by marine creeks. The reed lands around the creeks are home to birds such as reed warbler, bluethroat and marsh harrier. The saline grasslands harbour salt-tolerant plants such as salicornia and sea blite. On the dikes, plants such as wild marjoram, common thunderweed, fine stork’s broom, agrimony and cat’s thorn grow.