In spring, waders such as common redshank, Eurasian curlew, snipe, and northern lapwing breed.
These include, for example, the rare brackish amphipod Gammarus insensibilis and sea club-rush (Bolboschoenus maritimus).
The grassland vegetation usually has a fairly small number of species, but those present are often scarce elsewhere, such as sea arrowgrass (Triglochin maritimum), divided sedge (Carex divisa) and strawberry clover (Trifolium fragiferum).
[2] The low ditch levels and agricultural runoff combine to remove much of the aquatic wildlife, although the arable fields may still be used by some wintering wildfowl.
Some areas of grazing marsh and other polder land have been used to recreate tidal habitats by a process of managed retreat.