Only 20 male bitterns exist on our island at present, and the fen reserve will support up to five breeding pairs.
Plans to secure the long term future of the bittern by providing suitable reedbed habitat are also showing progress.
Reports in 2002 on progress with the plan show that targets to increase the range and numbers of the bittern are being achieved.
That habitat was created with the bittern especially in mind.
The ditches are filled with silt and the bitterns will probably starve this year.
It is home to globally important populations of nesting terns and the bittern, which is increasingly scarce.
The bittern and the great crested grebe have been great rarities in my lifetime, but now are not at all uncommon in parts of the country.
There is a wealth of flora, and the bird life comprises some of the richest and rarest specimens of wild fowl, including bittern, heron, and many others.
